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Major release  : otp_src_R16A
Build date     : 2013-01-29

R16A is a major new release of Erlang/OTP.
You can download the full source distribution from
 
  http://www.erlang.org/download/otp_src_R16A.tar.gz
  http://www.erlang.org/download/otp_src_R16A.readme (this file)

Note: To unpack the TAR archive you need a GNU TAR compatible program.

For installation instructions please read the README that is part of
the distribution.

The Windows binary distribution can be downloaded from

  http://www.erlang.org/download/otp_win32_R16A.exe
  http://www.erlang.org/download/otp_win64_R16A.exe


On-line documentation can be found at http://www.erlang.org/doc/.
You can also download the complete HTML documentation or the Unix manual files

  http://www.erlang.org/download/otp_doc_html_R16A.tar.gz
  http://www.erlang.org/download/otp_doc_man_R16A.tar.gz

We also want to thank those that sent us patches, suggestions and bug reports,

The OTP Team


--- HIGHLIGHTS ----------------------------------------------------------

    OTP-7786  == ssh ==

	      Added User Guide for the SSH application

    OTP-9892  == erts ==

	      Process optimizations. The most notable:

	      -- New internal process table implementation allowing for
	      both parallel reads as well as writes. Especially read
	      operations have become really cheap. This reduce contention
	      in various situations. For example when, spawning processes,
	      terminating processes, sending messages, etc.

	      -- Optimizations of run queue management reducing contention.

	      -- Optimizations of process state changes reducing
	      contention.

	      These changes imply changes of the characteristics the
	      system. Most notable: changed timing in the system.

    OTP-9974  == erts ==

	      Non-blocking code loading. Earlier when an Erlang module was
	      loaded, all other execution in the VM were halted while the
	      load operation was carried out in single threaded mode. Now
	      modules are loaded without blocking the VM. Processes may
	      continue executing undisturbed in parallel during the entire
	      load operation. The load operation is completed by making the
	      loaded code visible to all processes in a consistent way with
	      one single atomic instruction. Non-blocking code loading will
	      improve realtime characteristics when modules are
	      loaded/upgraded on a running SMP system.

   OTP-10256  == inets ==

	      httpc: The HTTP client now supports HTTPS through proxies

   OTP-10336  == erts ==

	      Major port improvements. The most notable:

	      -- New internal port table implementation allowing for both
	      parallel reads as well as writes. Especially read operations
	      have become really cheap.This reduce contention in various
	      situations. For example when, creating ports, terminating
	      ports, etc. 

	      -- Dynamic allocation of port structures. This allow for a
	      much larger maximum amount of ports allowed as a default. The
	      previous default of 1024 has been raised to 65536. Maximum
	      amount of ports can be set using the +Q command line flag of
	      erl(1). The previously used environment variable
	      ERL_MAX_PORTS has been deprecated and scheduled for removal
	      in OTP-R17.

	      -- Major rewrite of scheduling of port tasks. Major benefits
	      of the rewrite are reduced contention on run queue locks, and
	      reduced amount of memory allocation operations needed. The
	      rewrite was also necessary in order to make it possible to
	      schedule signals from processes to ports.

	      -- Improved internal thread progress functionality for easy
	      management of unmanaged threads. This improvement was
	      necessary for the rewrite of the port task scheduling.

	      -- Rewrite of all process to port signal implementations in
	      order to make it possible to schedule those operations. All
	      port operations can now be scheduled which allows for reduced
	      lock contention on the port lock as well as truly
	      asynchronous communication with ports.

	      -- Optimized lookup of port handles from drivers.

	      -- Optimized driver lookup when creating ports.

	      -- Preemptable erlang:ports/0 BIF.

	      -- Improving responsiveness by bumping reductions for a
	      process calling a driver callback directly.

	      These changes imply changes of the characteristics of the
	      system. The most notable:

	      -- Order of signal delivery -- The previous implementation of
	      the VM has delivered signals from processes to ports in a
	      synchronous stricter fashion than required by the language.
	      As of ERTS version 5.10, signals are truly asynchronously
	      delivered. The order of signal delivery still adheres to the
	      requirements of the language, but only to the requirements.
	      That is, some signal sequences that previously always were
	      delivered in one specific order may now from time to time be
	      delivered in different orders. This may cause Erlang programs
	      that have made false assumptions about signal delivery order
	      to fail even though they previously succeeded. For more
	      information about signal ordering guarantees, see the chapter
	      on communication in the ERTS user's guide. The +n command
	      line flag of erl(1) can be helpful when trying to find
	      signaling order bugs in Erlang code that have been exposed by
	      these changes.

	      -- Latency of signals sent from processes to ports -- Signals
	      from processes to ports where previously always delivered
	      immediately. This kept latency for such communication to a
	      minimum, but it could cause lock contention which was very
	      expensive for the system as a whole. In order to keep this
	      latency low also in the future, most signals from processes
	      to ports are by default still delivered immediately as long
	      as no conflicts occur. Such conflicts include not being able
	      to acquire the port lock, but also include other conflicts.
	      When a conflict occur, the signal will be scheduled for
	      delivery at a later time. A scheduled signal delivery may
	      cause a higher latency for this specific communication, but
	      improves the overall performance of the system since it
	      reduce lock contention between schedulers. The default
	      behavior of only scheduling delivery of these signals on
	      conflict can be changed by passing the +spp command line flag
	      to erl(1). The behavior can also be changed on port basis
	      using the parallelism option of the open_port/2 BIF.

	      -- Execution time of the erlang:ports/0 BIF -- Since
	      erlang:ports/0 now can be preempted, the responsiveness of
	      the system as a whole has been improved. A call to
	      erlang:ports/0 may, however, take a much longer time to
	      complete than before. How much longer time heavily depends on
	      the system load.

	      -- Reduction cost of calling driver callbacks -- Calling a
	      driver callback is quite costly. This was previously not
	      reflected in reduction cost at all. Since the reduction cost
	      now has increased, a process performing lots of direct driver
	      calls will be scheduled out more frequently than before.

	      Potential incompatibilities:

	      -- driver_send_term() has been deprecated and has been
	      scheduled for removal in OTP-R17. Replace usage of
	      driver_send_term() with usage of erl_drv_send_term().

	      -- driver_output_term() has been deprecated and has been
	      scheduled for removal in OTP-R17. Replace usage of
	      driver_output_term() with usage of erl_drv_output_term().

	      -- The new function erl_drv_busy_msgq_limits() has been added
	      in order to able to control management of port queues.

	      The driver API version has been bumped to 2.1 from 2.0 due to
	      the above changes in the driver API.

   OTP-10410  == asn1 ==

	      The options for the ASN.1 compiler has been drastically
	      simplified. The backend is chosen by using ber, per, or uper.
	      The options optimize, nif, and driver are no longer needed.
	      The old options will still work, but will issue a warning.

	      Another change is that generated encode/2 function will
	      always return a binary (some backends used to return an
	      iolist).

   OTP-10588  == asn1 ==

	      The ASN.1 compiler will now always include necessary run-time
	      functions in the generated Erlang modules (except for
	      asn1rt_nif which is still neeeded). If the option 'inline' is
	      used the ASN.1 compiler will generate a warning. But if
	      '{inline,OutputFile}' is use, the ASN.1 compiler will refuse
	      to compile the file. (Use a .set.asn file if you need to
	      remove the output file.)

	      The 'BIT STRING' type will now be decoded as Erlang
	      bitstrings by default. Use the new legacy_bit_string option
	      to encode as lists of ones and zeroes. (The
	      compact_bit_string option still works as before.)

	      Open types are now always returned as binaries (when there is
	      no information allowing them to be decoded).


--- POTENTIAL INCOMPATIBILITIES -----------------------------------------

    OTP-9881  == common_test ==

	      It is now possible to let a test specification include other
	      test specifications. Included specs can either be joined with
	      the source spec (and all other joined specs), resulting in
	      one single test run, or they can be executed in separate test
	      runs. Also, a start flag/option, join_specs, has been
	      introduced, to be used in combination with the spec option.
	      With join_specs, Common Test can be told to either join
	      multiple test specifications, or run them separately. Without
	      join_specs, the latter behaviour is default. Note that this
	      is a change compared to earlier versions of Common Test,
	      where specifications could only be joined. More information
	      can be found in the Running Tests chapter in the User's Guide
	      (see the Test Specifications section).

   OTP-10117  == inviso ==

	      The inviso application has been removed.

   OTP-10170  == erts ==

	      Tuple funs (deprecated in R15B) are no longer supported.

   OTP-10195  == edoc ==

	      Since EDoc 0.7.7 (R14B02) separate values of union types can
	      be annotated. However, the parser has hitherto chosen not to
	      add the necessary parentheses due to backwards compatibility.

	      From this release on code traversing the output of
	      edoc_parser needs to take care of parentheses around separate
	      values of union types. Examples of such code are layout
	      modules and doclet modules.

   OTP-10336  == erts ==

	      Major port improvements. The most notable:

	      -- New internal port table implementation allowing for both
	      parallel reads as well as writes. Especially read operations
	      have become really cheap.This reduce contention in various
	      situations. For example when, creating ports, terminating
	      ports, etc. 

	      -- Dynamic allocation of port structures. This allow for a
	      much larger maximum amount of ports allowed as a default. The
	      previous default of 1024 has been raised to 65536. Maximum
	      amount of ports can be set using the +Q command line flag of
	      erl(1). The previously used environment variable
	      ERL_MAX_PORTS has been deprecated and scheduled for removal
	      in OTP-R17.

	      -- Major rewrite of scheduling of port tasks. Major benefits
	      of the rewrite are reduced contention on run queue locks, and
	      reduced amount of memory allocation operations needed. The
	      rewrite was also necessary in order to make it possible to
	      schedule signals from processes to ports.

	      -- Improved internal thread progress functionality for easy
	      management of unmanaged threads. This improvement was
	      necessary for the rewrite of the port task scheduling.

	      -- Rewrite of all process to port signal implementations in
	      order to make it possible to schedule those operations. All
	      port operations can now be scheduled which allows for reduced
	      lock contention on the port lock as well as truly
	      asynchronous communication with ports.

	      -- Optimized lookup of port handles from drivers.

	      -- Optimized driver lookup when creating ports.

	      -- Preemptable erlang:ports/0 BIF.

	      -- Improving responsiveness by bumping reductions for a
	      process calling a driver callback directly.

	      These changes imply changes of the characteristics of the
	      system. The most notable:

	      -- Order of signal delivery -- The previous implementation of
	      the VM has delivered signals from processes to ports in a
	      synchronous stricter fashion than required by the language.
	      As of ERTS version 5.10, signals are truly asynchronously
	      delivered. The order of signal delivery still adheres to the
	      requirements of the language, but only to the requirements.
	      That is, some signal sequences that previously always were
	      delivered in one specific order may now from time to time be
	      delivered in different orders. This may cause Erlang programs
	      that have made false assumptions about signal delivery order
	      to fail even though they previously succeeded. For more
	      information about signal ordering guarantees, see the chapter
	      on communication in the ERTS user's guide. The +n command
	      line flag of erl(1) can be helpful when trying to find
	      signaling order bugs in Erlang code that have been exposed by
	      these changes.

	      -- Latency of signals sent from processes to ports -- Signals
	      from processes to ports where previously always delivered
	      immediately. This kept latency for such communication to a
	      minimum, but it could cause lock contention which was very
	      expensive for the system as a whole. In order to keep this
	      latency low also in the future, most signals from processes
	      to ports are by default still delivered immediately as long
	      as no conflicts occur. Such conflicts include not being able
	      to acquire the port lock, but also include other conflicts.
	      When a conflict occur, the signal will be scheduled for
	      delivery at a later time. A scheduled signal delivery may
	      cause a higher latency for this specific communication, but
	      improves the overall performance of the system since it
	      reduce lock contention between schedulers. The default
	      behavior of only scheduling delivery of these signals on
	      conflict can be changed by passing the +spp command line flag
	      to erl(1). The behavior can also be changed on port basis
	      using the parallelism option of the open_port/2 BIF.

	      -- Execution time of the erlang:ports/0 BIF -- Since
	      erlang:ports/0 now can be preempted, the responsiveness of
	      the system as a whole has been improved. A call to
	      erlang:ports/0 may, however, take a much longer time to
	      complete than before. How much longer time heavily depends on
	      the system load.

	      -- Reduction cost of calling driver callbacks -- Calling a
	      driver callback is quite costly. This was previously not
	      reflected in reduction cost at all. Since the reduction cost
	      now has increased, a process performing lots of direct driver
	      calls will be scheduled out more frequently than before.

	      Potential incompatibilities:

	      -- driver_send_term() has been deprecated and has been
	      scheduled for removal in OTP-R17. Replace usage of
	      driver_send_term() with usage of erl_drv_send_term().

	      -- driver_output_term() has been deprecated and has been
	      scheduled for removal in OTP-R17. Replace usage of
	      driver_output_term() with usage of erl_drv_output_term().

	      -- The new function erl_drv_busy_msgq_limits() has been added
	      in order to able to control management of port queues.

	      The driver API version has been bumped to 2.1 from 2.0 due to
	      the above changes in the driver API.

   OTP-10410  == asn1 ==

	      The options for the ASN.1 compiler has been drastically
	      simplified. The backend is chosen by using ber, per, or uper.
	      The options optimize, nif, and driver are no longer needed.
	      The old options will still work, but will issue a warning.

	      Another change is that generated encode/2 function will
	      always return a binary (some backends used to return an
	      iolist).

   OTP-10417  == kernel sasl ==

	      It is no longer possible to have {Mod,Vsn} in the 'modules'
	      list in a .app file.

	      This was earlier possible, although never documented in the
	      .app file reference manual. It was however visible in the
	      documentation of application:load/[1,2], where the same term
	      as in a .app file can be used as the first argument.

	      The possibility has been removed since the Vsn part was never
	      used.

   OTP-10451  == ssl ==

	      Remove filter mechanisms that made error messages backwards
	      compatible with old ssl but hid information about what
	      actually happened.

	      This does not break the documented API however other reason
	      terms may be returned, so code that matches on the reason
	      part of {error, Reason} may fail.

   OTP-10490  == stdlib ==

	      If a child process fails in its start function, then the
	      error reason was earlier only reported as an error report
	      from the error_handler, and supervisor:start_link would only
	      return {error,shutdown}. This has been changed so the
	      supervisor will now return {error,{shutdown,Reason}}, where
	      Reason identifies the failing child and its error reason.
	      (Thanks to Tomas Pihl)

   OTP-10523  == tools ==

	      A new function, cover:flush(Nodes), is added which will fetch
	      data from remote nodes without stopping cover on those nodes.
	      This is used by test_server and common_test when it is safe
	      to assume that the node will be terminated after the test
	      anyway. The purpose is to avoid processes crashing when
	      re-loading the original beam if the processes is still
	      running old code.

	      Remote nodes will now continue to count code coverage if the
	      connection to the main node is broken. Earlier, a broken
	      connection would cause the cover_server on the remote node to
	      die and thus any still cover compiled modules would cause
	      process crash when trying to insert cover data in ets tables
	      that used to exist on the cover_server. The new functionality
	      also involves synchronization with the main node if the nodes
	      are reconnected.

   OTP-10588  == asn1 ==

	      The ASN.1 compiler will now always include necessary run-time
	      functions in the generated Erlang modules (except for
	      asn1rt_nif which is still neeeded). If the option 'inline' is
	      used the ASN.1 compiler will generate a warning. But if
	      '{inline,OutputFile}' is use, the ASN.1 compiler will refuse
	      to compile the file. (Use a .set.asn file if you need to
	      remove the output file.)

	      The 'BIT STRING' type will now be decoded as Erlang
	      bitstrings by default. Use the new legacy_bit_string option
	      to encode as lists of ones and zeroes. (The
	      compact_bit_string option still works as before.)

	      Open types are now always returned as binaries (when there is
	      no information allowing them to be decoded).

   OTP-10613  == ssl ==

	      Removed deprecated function ssl:pid/0, it has been pointless
	      since R14 but has been keep for backwards compatibility.

   OTP-10633  == erts ==

	      Erlang specification 4.7.3 defines max tuple size to 65535
	      elements It is now enforced to no more than 16777215 elements
	      (arity 24 bits)

	      Previous edge cases (28 bits) were not validated and could
	      cause undefined behaviour.

   OTP-10647  == erts ==

	      The previous default of a maximum of 32768 simultaneous
	      processes has been raised to 262144. This value can be
	      changed using the the +P command line flag of erl(1). Note
	      that the value passed now is considered as a hint, and that
	      actual value chosen in most cases will be a power of two.

--- CHARACTERISTICS IMPACT -----------------------------------------------

    OTP-9892  == erts ==
	      
	      Process optimizations. The most notable:

	      -- New internal process table implementation allowing for
	      both parallel reads as well as writes. Especially read
	      operations have become really cheap. This reduce contention
	      in various situations. For example when, spawning processes,
	      terminating processes, sending messages, etc.

	      -- Optimizations of run queue management reducing contention.

	      -- Optimizations of process state changes reducing
	      contention.

	      These changes imply changes of the characteristics the
	      system. Most notable: changed timing in the system.


    OTP-9974  == erts ==
	      
	      Non-blocking code loading. Earlier when an Erlang module was
	      loaded, all other execution in the VM were halted while the
	      load operation was carried out in single threaded mode. Now
	      modules are loaded without blocking the VM. Processes may
	      continue executing undisturbed in parallel during the entire
	      load operation. The load operation is completed by making the
	      loaded code visible to all processes in a consistent way with
	      one single atomic instruction. Non-blocking code loading will
	      improve realtime characteristics when modules are
	      loaded/upgraded on a running SMP system.

   OTP-10122  == erts ==
	      
	      In the SMP emulator, turning on and off tracing will no
	      longer take down the system to single-scheduling.

   OTP-10167  == erts ==
	      
	      Optimized deletion of ETS-tables which significantly improves
	      performance when large amounts of temporary tables are used.

	      This change imply changes of the characteristics the system.
	      Most notable: changed timing in the system.

   OTP-10273  == erts ==
	      
	      New internal header scheme for allocators

	      Impact: Reduces size on object allocated in multiblock
	      carriers by one word

   OTP-10336  == erts ==
	      
	      Major port improvements.

	      These changes imply changes of the characteristics of the
	      system. The most notable:

	      -- Order of signal delivery -- The previous implementation of
	      the VM has delivered signals from processes to ports in a
	      synchronous stricter fashion than required by the language.
	      As of ERTS version 5.10, signals are truly asynchronously
	      delivered. The order of signal delivery still adheres to the
	      requirements of the language, but only to the requirements.
	      That is, some signal sequences that previously always were
	      delivered in one specific order may now from time to time be
	      delivered in different orders. This may cause Erlang programs
	      that have made false assumptions about signal delivery order
	      to fail even though they previously succeeded. For more
	      information about signal ordering guarantees, see the chapter
	      on communication in the ERTS user's guide. The +n command
	      line flag of erl(1) can be helpful when trying to find
	      signaling order bugs in Erlang code that have been exposed by
	      these changes.

	      -- Latency of signals sent from processes to ports -- Signals
	      from processes to ports where previously always delivered
	      immediately. This kept latency for such communication to a
	      minimum, but it could cause lock contention which was very
	      expensive for the system as a whole. In order to keep this
	      latency low also in the future, most signals from processes
	      to ports are by default still delivered immediately as long
	      as no conflicts occur. Such conflicts include not being able
	      to acquire the port lock, but also include other conflicts.
	      When a conflict occur, the signal will be scheduled for
	      delivery at a later time. A scheduled signal delivery may
	      cause a higher latency for this specific communication, but
	      improves the overall performance of the system since it
	      reduce lock contention between schedulers. The default
	      behavior of only scheduling delivery of these signals on
	      conflict can be changed by passing the +spp command line flag
	      to erl(1). The behavior can also be changed on port basis
	      using the parallelism option of the open_port/2 BIF.

	      -- Execution time of the erlang:ports/0 BIF -- Since
	      erlang:ports/0 now can be preempted, the responsiveness of
	      the system as a whole has been improved. A call to
	      erlang:ports/0 may, however, take a much longer time to
	      complete than before. How much longer time heavily depends on
	      the system load.

	      -- Reduction cost of calling driver callbacks -- Calling a
	      driver callback is quite costly. This was previously not
	      reflected in reduction cost at all. Since the reduction cost
	      now has increased, a process performing lots of direct driver
	      calls will be scheduled out more frequently than before.

   OTP-10661  == erts ==
	      
	      The previously (in R15) proposed scheduler wakeup strategy is
	      now used by default. This strategy is not as quick to forget
	      about previous overload as the previous strategy.

	      This change imply changes of the characteristics the system.
	      Most notable: When a small overload comes and then disappears
	      repeatedly, the system will for a bit longer time be willing
	      to wake up schedulers than before. Timing in the system will
	      due to this also change.

	      The previous strategy can still be enabled by passing the
	      +sws legacy command line flag to erl.

   OTP-10736  == erts ==
	      
	      The runtime system will now by default use 10 async threads
	      if thread support has been enabled when building the runtime
	      system.

	      This will prevent long blocking file-operations from blocking
	      scheduler threads for long periods of time, which can be
	      harmful. Apart from file-operations, it also effects other
	      operations scheduled on the async thread pool by user
	      implemented drivers.

	      The amount of async threads can be controlled by using the +A
	      command line argument of erl(1). When running some offline
	      tools you might want to disable async threads, but you are
	      advised not to in the general case. Instead, you might want
	      to increase the amount of async threads used.

	      This change imply changes of the characteristics the system
	      compared to the previous default. The responsiveness of the
	      system as a whole will be improved. Operations scheduled on
	      the async thread pool will get an increased latency. The
	      throughput of these operations may increase, or decrease
	      depending on the type of the operations and how they get
	      scheduled. In the case of file operations, the throughput
	      very much depends on how the Erlang application access files.
	      Multiple concurrent accesses to different files have the
	      potential of an increased throughput.

   OTP-10737  == erts ==
	      
	      The default reader group limit has been increased to 64 from
	      8. This limit can be set using the +rg command line argument
	      of erl(1).

	      This change of default value will reduce lock contention on
	      ETS tables using the read_concurrency option at the expense
	      of memory consumption when the amount of schedulers and
	      logical processors are beween 8 and 64. For more information,
	      see documentation of the +rg command line argument of erl(1).

   OTP-10787  == erts ==
	      
	      Increased potential concurrency in ETS for write_concurrency
	      option. The number of internal table locks has increased from
	      16 to 64. This makes it four times less likely that two
	      concurrent processes writing to the same table would collide
	      and thereby serialized. The cost is an increased constant
	      memory footprint for tables using write_concurrency. The
	      memory consumption per inserted record is not affected. The
	      increased footprint can be particularly large if
	      write_concurrency is combined with read_concurrency.

   OTP-10519  == asn1 ==
	      
	      The ASN.1 compiler generates faster decode functions for PER
	      and UPER. Some minor improvements have also been made for
	      PER/UPER encoding, and to the BER backend.

   OTP-10506  == odbc ==
	      
	      Under Unix enable TCP_NODELAY to disable Nagel's socket
	      algorithm. Thanks to Andy Richards

	      Impact: Performance gain on Unix systems

   OTP-10361  == ssl ==
	      
	      Support Next Protocol Negotiation in TLS, thanks to Ben
	      Murphy for the contribution.

	      Impact: Could give performance benefit if used as it saves a
	      round trip.

   OTP-10425  == ssl ==
	      
	      TLS 1.2 will now be the default TLS version if sufficient
	      crypto support is available otherwise TLS 1.1 will be
	      default.

	      Impact: A default TLS connection will have higher security
	      and hence it may be perceived as slower then before.

   OTP-10710  == ssl ==
	      
	      Now handles cleaning of CA-certificate database correctly so
	      that there will be no memory leek, bug was introduced in ssl-
	      5.1 when changing implementation to increase parallel
	      execution.

	      Impact: Improved memory usage, especially if you have many
	      different certificates and upgrade tcp-connections to
	      TLS-connections.



--- inviso --------------------------------------------------------------

   OTP-10117  The inviso application has been removed.


--- otp -----------------------------------------------------------------

    OTP-9684  Most specs for built in functions now reside in their
	      respective module instead of being coded in the erl_bif_types
	      module of the Hipe application. This creatyes a single source
	      for specifications and documentation, which should radically
	      lessen the risk for differences between the docs and the
	      actual spec seen by dialyzer.

    OTP-9862  Many types and specifications that used to reside in
	      erl_bif_types have been moved into respective module.

   OTP-10616  The experimental feature "parameterized modules" (also called
	      "abstract modules") has been removed. For applications that
	      depends on parameterized modules, there is a parse transform
	      that can be used to still use parameterized modules. The
	      parse transform can be found at:
	      github.com/erlang/pmod_transform

   OTP-10726  Implement ./otp_build configure --enable-silent-rules

	      With silent rules, the output of make is less verbose and
	      compilation warnings are easier to spot. Silent rules are
	      disabled by default and can be disabled or enabled at will by
	      make V=0 and make V=1. (Thanks to Anthony Ramine)


--- appmon-2.1.14.2 -----------------------------------------------------

   OTP-10784  Misc build updates

   OTP-10786  The backend module appmon_info.erl is moved from appmon
	      application to runtime_tools. This allows appmon to be run
	      from a remote erlang node towards a target node which does
	      not have appmon (and its dependencies) installed, as long as
	      runtime_tools is installed there.


--- asn1-2.0 ------------------------------------------------------------

   OTP-10410  The options for the ASN.1 compiler has been drastically
	      simplified. The backend is chosen by using ber, per, or uper.
	      The options optimize, nif, and driver are no longer needed.
	      The old options will still work, but will issue a warning.

	      Another change is that generated encode/2 function will
	      always return a binary (some backends used to return an
	      iolist).

   OTP-10519  The ASN.1 compiler generates faster decode functions for PER
	      and UPER. Some minor improvements have also been made for
	      PER/UPER encoding, and to the BER backend.

   OTP-10588  The ASN.1 compiler will now always include necessary run-time
	      functions in the generated Erlang modules (except for
	      asn1rt_nif which is still needed). If the option 'inline' is
	      used the ASN.1 compiler will generate a warning. But if
	      '{inline,OutputFile}' is use, the ASN.1 compiler will refuse
	      to compile the file. (Use a .set.asn file if you need to
	      remove the output file.)

	      The 'BIT STRING' type will now be decoded as Erlang
	      bitstrings by default. Use the new legacy_bit_string option
	      to encode as lists of ones and zeroes. (The
	      compact_bit_string option still works as before.)

	      Open types are now always returned as binaries (when there is
	      no information allowing them to be decoded).

   OTP-10664  Encoding SEQUENCEs with multiple extension addition groups
	      with optional values could fail (depending both on the
	      specification and whether all values were provided).


--- common_test-1.6.3.1 -------------------------------------------------

   OTP-10589  The following corrections/changes are done in the cth_surefire 
              hook: Earlier there would always be a 'properties' element 
              under the 'testsuites' element. This would exist even if 
              there were no 'property' element inside it. This has been 
              changed so if there are no 'property' elements to display, 
              then there will not be a 'properties' element either. The 
              XML file will now (unless other is specified) be stored 
              in the top log directory. Earlier, the default directory 
              would be the current working directory for the erlang node, 
              which would mostly, but not always, be the top log directory. 
              The 'hostname' attribute in the 'testsuite' element would 
              earlier never have the correct value. This has been corrected. 
              The 'errors' attribute in the 'testsuite' element would 
              earlier display the number of failed testcases. This has 
              been changed and will now always have the value 0, while 
              the 'failures' attribute will show the number of failed 
              testcases. A new attribute 'skipped' is added to the 'testsuite' 
              element. This will display the number of skipped testcases. 
              These would earlier be included in the number of failed 
              test cases. The total number of tests displayed by the 'tests' 
              attribute in the 'testsuite' element would earlier include 
              init/end_per_suite and init/end_per_group. This is no longer 
              the case. The 'tests' attribute will now only count "real" 
              test cases. Earlier, auto skipped test cases would have 
              no value in the 'log' attribute. This is now corrected. 
              A new attributes 'log' is added to the 'testsuite' element. 
              A new option named 'url_base' is added for this hook. If 
              this option is used, a new attribute named 'url' will be 
              added to the 'testcase' and 'testsuite' elements.


--- common_test-1.7 -----------------------------------------------------

    OTP-9769  Severe errors detected by test_server (e.g. if log files
	      directories cannot be created) will now be reported to
	      common_test and noted in the common_test logs.

    OTP-9870  The earlier undocumented cross cover feature for accumulating
	      cover data over multiple tests has now been fixed and
	      documented.

    OTP-9881  It is now possible to let a test specification include other
	      test specifications. Included specs can either be joined with
	      the source spec (and all other joined specs), resulting in
	      one single test run, or they can be executed in separate test
	      runs. Also, a start flag/option, join_specs, has been
	      introduced, to be used in combination with the spec option.
	      With join_specs, Common Test can be told to either join
	      multiple test specifications, or run them separately. Without
	      join_specs, the latter behaviour is default. Note that this
	      is a change compared to earlier versions of Common Test,
	      where specifications could only be joined. More information
	      can be found in the Running Tests chapter in the User's Guide
	      (see the Test Specifications section).

   OTP-10040  If a busy test case generated lots of error messages,
	      cth_log_redirect:post_end_per_testcase would crash with a
	      timeout while waiting for the error logger to finish handling
	      all error reports. The default timer was 5 seconds. This has
	      now been extended to 5 minutes.

   OTP-10070  When a test case failed because of a timetrap time out, the
	      Config data for the case was lost in the following call to
	      end_per_testcase/2, and also in calls to the CT Hook function
	      post_end_per_testcase/4. This problem has been solved and the
	      Config data is now correctly passed to the above functions
	      after a timetrap timeout failure.

   OTP-10088  Some calls to deprecated and removed functions in snmp are
	      removed from ct_snmp.

   OTP-10101  In test_server, the same process would supervise the
	      currently running test case and be group leader (and IO
	      server) for the test case. Furthermore, when running parallel
	      test cases, new temporary supervisor/group leader processes
	      were spawned and the process that was group leader for
	      sequential test cases would not be active. That would lead to
	      several problems:

	      * Processes started by init_per_suite will inherit the group
	      leader of the init_per_suite process (and that group leader
	      would not process IO requests when parallel test cases was
	      running). If later a parallel test case caused such a
	      processto print using (for example) io:format/2, the calling
	      would hang.

	      * Similarly, if a process was spawned from a parallel test
	      case, it would inherit the temporary group leader for that
	      parallel test case. If that spawned process later - when the
	      group of parallel tests have finished - attempted to print
	      something, its group leader would be dead and there would be
	      badarg exception.

	      Those problems have been solved by having group leaders
	      separate from the processes that supervises the test cases,
	      and keeping temporary group leader process for parallel test
	      cases alive until no more process in the system use them as
	      group leaders.

	      Also, a new unexpected_io.log log file (reachable from the
	      summary page of each test suite) has been introduced. All
	      unexpected IO will be printed into it(for example, IO to a
	      group leader for a parallel test case that has finished).

   OTP-10432  Some bugfixes in ct_snmp:

	      -- ct_snmp will now use the value of the 'agent_vsns' config
	      variable when setting the 'variables' parameter to snmp
	      application agent configuration. Earlier this had to be done
	      separately - i.e. the supported versions had to be specified
	      twice.

	      -- Snmp application failed to write notify.conf since ct_snmp
	      gave the notify type as a string instead of an atom. This has
	      been corrected.

   OTP-10434  Some bugfixes in ct_snmp:

	      -- Functions register_users/2, register_agents/2 and
	      register_usm_users/2, and the corresponding unregister_*/1
	      functions were not executable. These are corrected/rewritten.

	      -- Function update_usm_users/2 is removed, and an unregister
	      function is added instead. Update can now be done with
	      unregister_usm_users and then register_usm_users.

	      -- Functions unregister_*/2 are added, so specific
	      users/agents/usm users can be unregistered.

	      -- Function unload_mibs/1 is added for completeness.

	      -- Overriding configuration files did not work, since the
	      files were written in priv_dir instead of in the
	      configuration dir (priv_dir/conf). This has been corrected.

	      -- Arguments to register_usm_users/2 were faulty documented.
	      This has been corrected.

   OTP-10469  The ct_slave:start/3 function now supports an
	      {env,[{Var,Value}]} option to extend environment for the
	      slave node.

   OTP-10601  Faulty exported specs in common test has been corrected to
	      ct_netconfc:hook_options/0 and inet:hostname/0

   OTP-10646  The netconf client in common_test did not adjust the window
	      after receiving data. Due to this, the client stopped
	      receiving data after a while. This has been corrected.

   OTP-10665  Some examples overflowing the width of PDF pages have been
	      corrected.

   OTP-10783  Update common test modules to handle unicode

	      -- Use UTF-8 encoding for all HTML files, except the HTML
	      version of the test suite generated with erl2html2:convert,
	      which will have the same encoding as the original test suite
	      (.erl) file.

	      -- Encode link targets in HTML files with
	      test_server_ctrl:uri_encode/1.

	      -- Use unicode modifier 't' with ~s when appropriate.

	      -- Use unicode:characters_to_list and
	      unicode:characters_to_binary for conversion between binaries
	      and strings instead of binary_to_list and list_to_binary.


--- compiler-4.9 --------------------------------------------------------

   OTP-10193  The compiler optimizations have been polished, so that the
	      code quality will be slightly better in some cases.

   OTP-10302  Support for Unicode has been implemented.

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.

   OTP-10690  Fix some wrong warnings triggered by the option
	      inline_list_funcs. Thanks to Anthony Ramine.

   OTP-10706  Forbid local fun variables in Core Erlang guards. Thanks to
	      Anthony Ramine.

   OTP-10724  Binary syntax matches could cause an internal consistency
	      error in in the compiler. (Thanks to Viktor Sovietov for
	      reporting this bug.)


--- cosEvent-2.1.13 -----------------------------------------------------

   OTP-10784  Misc build updates


--- cosEventDomain-1.1.13 -----------------------------------------------

   OTP-10784  Misc build updates


--- cosFileTransfer-1.1.14 ----------------------------------------------

   OTP-10784  Misc build updates


--- cosNotification-1.1.19 ----------------------------------------------

   OTP-10784  Misc build updates


--- cosProperty-1.1.16 --------------------------------------------------

   OTP-10784  Misc build updates


--- cosTime-1.1.13 ------------------------------------------------------

   OTP-10784  Misc build updates


--- cosTransactions-1.2.13 ----------------------------------------------

   OTP-10784  Misc build updates


--- crypto-2.3 ----------------------------------------------------------

   OTP-10596  Enable runtime upgrade of crypto including the OpenSSL
	      library used by crypto.

   OTP-10640  Improve documentation and tests for hmac functions in crypto.
	      Thanks to Daniel White

   OTP-10667  Added ripemd160 support to crypto. Thanks to Michael Loftis


--- debugger-3.2.9 ------------------------------------------------------

   OTP-10302  Support for Unicode has been implemented.

   OTP-10621  Fix Debugger settings dialog due to changed behavior in
	      wxFileDialog (Thanks to Hĺkan Mattsson)

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.

   OTP-10679  Integer lists and utf-8 binaries in variables are now
	      displayed as strings.


--- dialyzer-2.5.4 ------------------------------------------------------

   OTP-10302  Support for Unicode has been implemented.

   OTP-10433  Dialyzer no longer outputs warnings for unused anonymous
	      functions ("funs"). Warnings are still output for unused
	      functions.

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.

   OTP-10665  Some examples overflowing the width of PDF pages have been
	      corrected.

   OTP-10681  Fix precision of record creation violation warnings. Thanks
	      to Stavros Aronis

   OTP-10740  Report spec discrepancy on mismatching lists. Thanks to
	      Stavros Aronis.

   OTP-10772  Properly support functions with arbitrary arity in type
	      specs. Thanks to Stavros Aronis.


--- diameter-1.4 --------------------------------------------------------

   OTP-10442  Add registered server names to the app file.

   OTP-10609  Fix #diameter_header{} handling broken by OTP-10445.

	      The fault caused the the header of a [Header | Avps] request
	      to be ignored if both end_to_end_id and hop_by_hop_id were
	      undefined.

   OTP-10614  Fix error handling for handle_request callback.

	      A callback that returned a #diameter_packet{} would fail if
	      the incoming request had decode errors.

   OTP-10618  Fix timing of service start event.

	      The event did not necessarily precede other events as
	      documented.

   OTP-10619  Fix setting of header T flag at peer failover.

	      The flag is now set in the diameter_header record passed to a
	      prepare_retransmit callback.

   OTP-10628  Fix sending of CER/CEA timeout event at capx_timeout.

	      The event was not sent as documented.

   OTP-10655  Fix improper setting of Application-ID in the Diameter header
	      of an answer message whose E flag is set.

	      The value should be that of the request in question. The
	      fault caused it always to be 0.

   OTP-10693  Fix faulty handling of AVP length errors.

	      An incorrect AVP length but no other errors caused an
	      incoming request to fail.


--- edoc-0.7.11 ---------------------------------------------------------

   OTP-10195  Since EDoc 0.7.7 (R14B02) separate values of union types can
	      be annotated. However, the parser has hitherto chosen not to
	      add the necessary parentheses due to backwards compatibility.

	      From this release on code traversing the output of
	      edoc_parser needs to take care of parentheses around separate
	      values of union types. Examples of such code are layout
	      modules and doclet modules.

   OTP-10302  Support for Unicode has been implemented.

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.


--- eldap-1.0.1 ---------------------------------------------------------

   OTP-10403  Fixed various dialyzer warnings

   OTP-10728  Configure the SSL options fully in eldap.


--- erl_docgen-0.3.4 ----------------------------------------------------

   OTP-10302  Support for Unicode has been implemented.

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.

   OTP-10665  Some examples overflowing the width of PDF pages have been
	      corrected.

   OTP-10725  Correct a PDF indentation bug for tagged lists in tagged
	      lists and added some missing tags to the DTD.


--- erl_interface-3.7.10 ------------------------------------------------

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.

   OTP-10753  Limited support for unicode atoms in the external format and
	      in the internal representation of the vm. This is a
	      preparative feature in order to support communication with
	      future releases of Erlang/OTP that may create unicode atoms.


--- erts-5.9.3.1 --------------------------------------------------------

   OTP-10602  Create an erl_crash.dump if no heart exists and no ERL_CRASH_DUMP_SECONDS 
              is set (behaviour changed). Don't create an erl_crash.dump 
              if heart do exists and no ERL_CRASH_DUMP_SECONDS is set 
              (behaviour not changed). This changes the behaviour back 
              to the R15B02 default considering if a beam was running 
              with no heart.


--- erts-5.10 -----------------------------------------------------------

    OTP-8928  A boolean socket option 'ipv6_v6only' for IPv6 sockets has
	      been added. The default value of the option is OS dependent,
	      so applications aiming to be portable should consider using
	      {ipv6_v6only,true} when creating an inet6
	      listening/destination socket, and if neccesary also create an
	      inet socket on the same port for IPv4 traffic. See the
	      documentation.

    OTP-9861  It is now allowed to define stubs for BIFs, to allow type
	      specs to be written for BIFs. For example, if there is BIF
	      called lists:member/2, a dummy definition of lists:member/2
	      is now allowed.

    OTP-9892  Process optimizations. The most notable:

	      -- New internal process table implementation allowing for
	      both parallel reads as well as writes. Especially read
	      operations have become really cheap. This reduce contention
	      in various situations. For example when, spawning processes,
	      terminating processes, sending messages, etc.

	      -- Optimizations of run queue management reducing contention.

	      -- Optimizations of process state changes reducing
	      contention.

	      These changes imply changes of the characteristics the
	      system. Most notable: changed timing in the system.

    OTP-9974  Non-blocking code loading. Earlier when an Erlang module was
	      loaded, all other execution in the VM were halted while the
	      load operation was carried out in single threaded mode. Now
	      modules are loaded without blocking the VM. Processes may
	      continue executing undisturbed in parallel during the entire
	      load operation. The load operation is completed by making the
	      loaded code visible to all processes in a consistent way with
	      one single atomic instruction. Non-blocking code loading will
	      improve realtime characteristics when modules are
	      loaded/upgraded on a running SMP system.

   OTP-10122  In the SMP emulator, turning on and off tracing will no
	      longer take down the system to single-scheduling.

   OTP-10146  Remove VxWorks support

   OTP-10156  Added a general framework for executing benchmarks of
	      Erlang/OTP. Benchmarks for the Erlang VM and mnesia have been
	      incorporated in the framework. 

	      For details about how to add more benchmarks see
	      $ERL_TOP/HOWTO/BENCHMARKS.md in the source distribution.

   OTP-10167  Optimized deletion of ETS-tables which significantly improves
	      performance when large amounts of temporary tables are used.

	      This change imply changes of the characteristics the system.
	      Most notable: changed timing in the system.

   OTP-10170  Tuple funs (deprecated in R15B) are no longer supported.

   OTP-10273  New internal header scheme for allocators

	      Impact: Reduces size on object allocated in multiblock
	      carriers by one word

   OTP-10336  Major port improvements. The most notable:

	      -- New internal port table implementation allowing for both
	      parallel reads as well as writes. Especially read operations
	      have become really cheap.This reduce contention in various
	      situations. For example when, creating ports, terminating
	      ports, etc. 

	      -- Dynamic allocation of port structures. This allow for a
	      much larger maximum amount of ports allowed as a default. The
	      previous default of 1024 has been raised to 65536. Maximum
	      amount of ports can be set using the +Q command line flag of
	      erl(1). The previously used environment variable
	      ERL_MAX_PORTS has been deprecated and scheduled for removal
	      in OTP-R17.

	      -- Major rewrite of scheduling of port tasks. Major benefits
	      of the rewrite are reduced contention on run queue locks, and
	      reduced amount of memory allocation operations needed. The
	      rewrite was also necessary in order to make it possible to
	      schedule signals from processes to ports.

	      -- Improved internal thread progress functionality for easy
	      management of unmanaged threads. This improvement was
	      necessary for the rewrite of the port task scheduling.

	      -- Rewrite of all process to port signal implementations in
	      order to make it possible to schedule those operations. All
	      port operations can now be scheduled which allows for reduced
	      lock contention on the port lock as well as truly
	      asynchronous communication with ports.

	      -- Optimized lookup of port handles from drivers.

	      -- Optimized driver lookup when creating ports.

	      -- Preemptable erlang:ports/0 BIF.

	      -- Improving responsiveness by bumping reductions for a
	      process calling a driver callback directly.

	      These changes imply changes of the characteristics of the
	      system. The most notable:

	      -- Order of signal delivery -- The previous implementation of
	      the VM has delivered signals from processes to ports in a
	      synchronous stricter fashion than required by the language.
	      As of ERTS version 5.10, signals are truly asynchronously
	      delivered. The order of signal delivery still adheres to the
	      requirements of the language, but only to the requirements.
	      That is, some signal sequences that previously always were
	      delivered in one specific order may now from time to time be
	      delivered in different orders. This may cause Erlang programs
	      that have made false assumptions about signal delivery order
	      to fail even though they previously succeeded. For more
	      information about signal ordering guarantees, see the chapter
	      on communication in the ERTS user's guide. The +n command
	      line flag of erl(1) can be helpful when trying to find
	      signaling order bugs in Erlang code that have been exposed by
	      these changes.

	      -- Latency of signals sent from processes to ports -- Signals
	      from processes to ports where previously always delivered
	      immediately. This kept latency for such communication to a
	      minimum, but it could cause lock contention which was very
	      expensive for the system as a whole. In order to keep this
	      latency low also in the future, most signals from processes
	      to ports are by default still delivered immediately as long
	      as no conflicts occur. Such conflicts include not being able
	      to acquire the port lock, but also include other conflicts.
	      When a conflict occur, the signal will be scheduled for
	      delivery at a later time. A scheduled signal delivery may
	      cause a higher latency for this specific communication, but
	      improves the overall performance of the system since it
	      reduce lock contention between schedulers. The default
	      behavior of only scheduling delivery of these signals on
	      conflict can be changed by passing the +spp command line flag
	      to erl(1). The behavior can also be changed on port basis
	      using the parallelism option of the open_port/2 BIF.

	      -- Execution time of the erlang:ports/0 BIF -- Since
	      erlang:ports/0 now can be preempted, the responsiveness of
	      the system as a whole has been improved. A call to
	      erlang:ports/0 may, however, take a much longer time to
	      complete than before. How much longer time heavily depends on
	      the system load.

	      -- Reduction cost of calling driver callbacks -- Calling a
	      driver callback is quite costly. This was previously not
	      reflected in reduction cost at all. Since the reduction cost
	      now has increased, a process performing lots of direct driver
	      calls will be scheduled out more frequently than before.

	      Potential incompatibilities:

	      -- driver_send_term() has been deprecated and has been
	      scheduled for removal in OTP-R17. Replace usage of
	      driver_send_term() with usage of erl_drv_send_term().

	      -- driver_output_term() has been deprecated and has been
	      scheduled for removal in OTP-R17. Replace usage of
	      driver_output_term() with usage of erl_drv_output_term().

	      -- The new function erl_drv_busy_msgq_limits() has been added
	      in order to able to control management of port queues.

	      The driver API version has been bumped to 2.1 from 2.0 due to
	      the above changes in the driver API.

   OTP-10348  The experimental support for packages has been removed.

   OTP-10491  Set new peeled off SCTP socket to nonblocking socket (Thanks
	      to Jonas Falkevik)

   OTP-10522  Wrong parameters when setting seq_trace-tokens from within a
	      trace-pattern could crash the VM. This is now corrected.

   OTP-10611  Fix various typos (thanks to Tuncer Ayaz)

   OTP-10633  Erlang specification 4.7.3 defines max tuple size to 65535
	      elements It is now enforced to no more than 16777215 elements
	      (arity 24 bits)

	      Previous edge cases (28 bits) were not validated and could
	      cause undefined behaviour.

   OTP-10643  Add insert_element/3 and delete_element/2

   OTP-10647  The previous default of a maximum of 32768 simultaneous
	      processes has been raised to 262144. This value can be
	      changed using the the +P command line flag of erl(1). Note
	      that the value passed now is considered as a hint, and that
	      actual value chosen in most cases will be a power of two.

   OTP-10661  The previously (in R15) proposed scheduler wakeup strategy is
	      now used by default. This strategy is not as quick to forget
	      about previous overload as the previous strategy.

	      This change imply changes of the characteristics the system.
	      Most notable: When a small overload comes and then disappears
	      repeatedly, the system will for a bit longer time be willing
	      to wake up schedulers than before. Timing in the system will
	      due to this also change.

	      The previous strategy can still be enabled by passing the
	      +sws legacy command line flag to erl.

   OTP-10668  The +stbt command line argument of erl was added. This
	      argument can be used for trying to set scheduler bind type.
	      Upon failure unbound schedulers will be used.

   OTP-10677  Fix fd leak when using async thread pool

	      When using the async thread pool, if an erlang process asks
	      to open a file and it gets shutdown/killed while the
	      file:open/2 call hasn't returned, it's possible to leak a
	      file descriptor against the target file. This has now been
	      fixed. (Thanks to Filipe David Manana)

   OTP-10678  Support ANSI in console

	      Unix platforms will no longer filter control sequences to the
	      ttsl driver thus enabling ANSI and colors in console. (Thanks
	      to Pedram Nimreezi)

   OTP-10680  Add file:allocate/3 operation

	      This operation allows pre-allocation of space for files. It
	      succeeds only on systems that support such operation. (Thanks
	      to Filipe David Manana)

   OTP-10683  Treat -Wreturn-type warnings as error when using GCC (Thanks
	      to Tuncer Ayaz)

   OTP-10699  Use sys/types.h instead of string.h to pull ssize_t
	      definition to erl_driver.h. This fixes build issue on NetBSD.
	      (Thanks to Yamamoto Takashi).

   OTP-10702  Arguments given with the -run or -s flags to erl are now
	      translated according to the file name encoding mode of the
	      runtime system.

   OTP-10726  Implement ./otp_build configure --enable-silent-rules

	      With silent rules, the output of make is less verbose and
	      compilation warnings are easier to spot. Silent rules are
	      disabled by default and can be disabled or enabled at will by
	      make V=0 and make V=1. (Thanks to Anthony Ramine)

   OTP-10727  Use share flags for all file operations on Windows. Thanks to
	      Filipe David Borba Manana.

   OTP-10733  Make/fakefop adjustments. Thanks to Tuncer Ayaz and Sebastian
	      Rasmussen.

   OTP-10736  The runtime system will now by default use 10 async threads
	      if thread support has been enabled when building the runtime
	      system.

	      This will prevent long blocking file-operations from blocking
	      scheduler threads for long periods of time, which can be
	      harmful. Apart from file-operations, it also effects other
	      operations scheduled on the async thread pool by user
	      implemented drivers.

	      The amount of async threads can be controlled by using the +A
	      command line argument of erl(1). When running some offline
	      tools you might want to disable async threads, but you are
	      advised not to in the general case. Instead, you might want
	      to increase the amount of async threads used.

	      This change imply changes of the characteristics the system
	      compared to the previous default. The responsiveness of the
	      system as a whole will be improved. Operations scheduled on
	      the async thread pool will get an increased latency. The
	      throughput of these operations may increase, or decrease
	      depending on the type of the operations and how they get
	      scheduled. In the case of file operations, the throughput
	      very much depends on how the Erlang application access files.
	      Multiple concurrent accesses to different files have the
	      potential of an increased throughput.

   OTP-10737  The default reader group limit has been increased to 64 from
	      8. This limit can be set using the +rg command line argument
	      of erl(1).

	      This change of default value will reduce lock contention on
	      ETS tables using the read_concurrency option at the expense
	      of memory consumption when the amount of schedulers and
	      logical processors are beween 8 and 64. For more information,
	      see documentation of the +rg command line argument of erl(1).

   OTP-10746  The octet counters in the gen_tcp/inet interface could behave
	      in unexpected ways on 64bit platforms. The behaviour is now
	      as expected.

   OTP-10747  Certain linux kernels, most notably in redhat and CentOS
	      distribution, had a bug in writev which generated an infinite
	      loop in the tcp code of the VM. The bug is now worked around.

   OTP-10748  A process that got killed (got an exit signal) while
	      operating on a compresseed file, could cause a segmentation
	      fault in the VM. This is now corrected. Thanks to Filipe
	      David Manana for identifying the problem and submitting a
	      solution.

   OTP-10751  Windows previously used three digit exponent in formatting
	      which caused difference between platforms, as can be seen by
	      float_to_list/1. This has now been fixed.

   OTP-10752  New BIF float_to_list/2 which solves a problem of
	      float_to_list/1 that doesn't allow specifying the number of
	      digits after the decimal point when formatting floats (Thanks
	      to Serge Aleynikov).

   OTP-10753  Limited support for unicode atoms in the external format and
	      in the internal representation of the vm. This is a
	      preparative feature in order to support communication with
	      future releases of Erlang/OTP that may create unicode atoms.

   OTP-10787  Increased potential concurrency in ETS for write_concurrency
	      option. The number of internal table locks has increased from
	      16 to 64. This makes it four times less likely that two
	      concurrent processes writing to the same table would collide
	      and thereby serialized. The cost is an increased constant
	      memory footprint for tables using write_concurrency. The
	      memory consumption per inserted record is not affected. The
	      increased footprint can be particularly large if
	      write_concurrency is combined with read_concurrency.


--- et-1.4.4.3 ----------------------------------------------------------

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.


--- eunit-2.2.4 ---------------------------------------------------------

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.


--- gs-1.5.15.2 ---------------------------------------------------------

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.


--- hipe-3.10 -----------------------------------------------------------

   OTP-10302  Support for Unicode has been implemented.

   OTP-10624  The type ascii_string() in the base64 module has been
	      corrected. The type file:file_info() has been cleaned up. The
	      type file:fd() has been made opaque in the documentation.

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.

   OTP-10705  Update .gitignore (lib/hipe/boot_ebin). Thanks to Tuncer
	      Ayaz.


--- ic-4.3 --------------------------------------------------------------

   OTP-10784  Misc build updates

   OTP-10785  Adapt ic for changes in erl_interface and jinterface due to
	      utf8 atom support. This change makes ic dependent on
	      erl_interface-3.7.10 (R16) or later in order to build.


--- inets-5.9.3 ---------------------------------------------------------

   OTP-10256  httpc: The HTTP client now supports HTTPS through proxies

   OTP-10665  Some examples overflowing the width of PDF pages have been
	      corrected.

   OTP-10765  Fix autoredirect for POST requests responding 303. Thanks to
	      Hans Svensson.


--- jinterface-1.5.7 ----------------------------------------------------

   OTP-10505  fix reading compressed binary terms from Java (Thanks to Nico
	      Kruber)

   OTP-10579  OtpEpmd.lokupNames() no longer hangs when badly configured
	      (Thanks to Vlad Dumitrescu)

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.

   OTP-10753  Limited support for unicode atoms in the external format and
	      in the internal representation of the vm. This is a
	      preparative feature in order to support communication with
	      future releases of Erlang/OTP that may create unicode atoms.


--- kernel-2.16 ---------------------------------------------------------

    OTP-8067  Inet exported functionality

	      inet:parse_ipv4_address/1, inet:parse_ipv4strict_address/1,
	      inet:parse_ipv6_address/1, inet:parse_ipv6strict_address/1,
	      inet:parse_address/1 and inet:parse_strict_address is now
	      exported from the inet module.

    OTP-8928  A boolean socket option 'ipv6_v6only' for IPv6 sockets has
	      been added. The default value of the option is OS dependent,
	      so applications aiming to be portable should consider using
	      {ipv6_v6only,true} when creating an inet6
	      listening/destination socket, and if neccesary also create an
	      inet socket on the same port for IPv4 traffic. See the
	      documentation.

   OTP-10302  Support for Unicode has been implemented.

   OTP-10417  It is no longer possible to have {Mod,Vsn} in the 'modules'
	      list in a .app file.

	      This was earlier possible, although never documented in the
	      .app file reference manual. It was however visible in the
	      documentation of application:load/[1,2], where the same term
	      as in a .app file can be used as the first argument.

	      The possibility has been removed since the Vsn part was never
	      used.

   OTP-10419  The documentation for global:register_name/3 has been updated
	      to mention that the use of {Module,Function} as the method
	      argument (resolve function) is deprecated.

   OTP-10473  The contract of erl_ddll:format_error/1 has been corrected.
	      (Thanks to Joseph Wayne Norton.)

   OTP-10549  Fixed bug where sendfile on oracle solaris would return an
	      error when a partial send was done.

   OTP-10617  The error_handler module will now call
	      '$handle_undefined_function'/2 if an attempt is made to call
	      a non-existing function in a module that exists. See the
	      documentation for error_handler module for details.

   OTP-10620  Change printout of application crash message on startup to
	      formated strings (Thanks to Serge Aleynikov)

   OTP-10624  The type ascii_string() in the base64 module has been
	      corrected. The type file:file_info() has been cleaned up. The
	      type file:fd() has been made opaque in the documentation.

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.

   OTP-10662  Do not return wrong terms unnecessarily. (Thanks to Kostis
	      Sagonas.)

   OTP-10665  Some examples overflowing the width of PDF pages have been
	      corrected.

   OTP-10680  Add file:allocate/3 operation

	      This operation allows pre-allocation of space for files. It
	      succeeds only on systems that support such operation. (Thanks
	      to Filipe David Manana)

   OTP-10694  Add application:get_key/3. The new function provides a
	      default value for a configuration parameter. Thanks to Serge
	      Aleynikov.

   OTP-10739  Add search to Erlang shell's history. Thanks to Fred Herbert.


--- megaco-3.16.0.3 -----------------------------------------------------

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.


--- mnesia-4.8 ----------------------------------------------------------

   OTP-10156  Added a general framework for executing benchmarks of
	      Erlang/OTP. Benchmarks for the Erlang VM and mnesia have been
	      incorporated in the framework. 

	      For details about how to add more benchmarks see
	      $ERL_TOP/HOWTO/BENCHMARKS.md in the source distribution.

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.

   OTP-10636  Use chained send_after instead of send_interval, to make
	      decrease the number of messages sent after a sleep (Thanks to
	      James Wheare)

   OTP-10639  Fix format of mnesia overload message (Thanks to Ahmed Omar)

   OTP-10729  Remove support for the query keyword and query expressions.
	      Thanks to Loďc Hoguin.


--- observer-1.3 --------------------------------------------------------

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.


--- odbc-2.10.14 --------------------------------------------------------

   OTP-10506  Under Unix enable TCP_NODELAY to disable Nagel's socket
	      algorithm. Thanks to Andy Richards

	      Impact: Performance gain on Unix systems

   OTP-10603  Added extended_errors option to ODBC

	      When enabled, this option alters the return code of ODBC
	      operations that produce errors to include the ODBC error code
	      as well as the native error code, in addition to the ODBC
	      reason field which is returned by default. Thanks to Bernard
	      Duggan.

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.

   OTP-10665  Some examples overflowing the width of PDF pages have been
	      corrected.

   OTP-10735  Fix aotocommit for Oracle ODBC driver in Linux. Thanks to
	      Danil Onishchenko.


--- orber-3.6.25 --------------------------------------------------------

   OTP-10665  Some examples overflowing the width of PDF pages have been
	      corrected.


--- os_mon-2.2.11 -------------------------------------------------------

   OTP-10448  Removed deprecated function calls to snmp


--- otp_mibs-1.0.8 ------------------------------------------------------

   OTP-10784  Misc build updates


--- parsetools-2.0.8 ----------------------------------------------------

   OTP-10302  Support for Unicode has been implemented.

   OTP-10660  The file esyntax.yrl has been removed.


--- percept-0.8.8 -------------------------------------------------------

   OTP-10784  Misc build updates


--- pman-2.7.1.3 --------------------------------------------------------

   OTP-10784  Misc build updates


--- public_key-0.18 -----------------------------------------------------

    OTP-7045  public_key now supports CRL validation and documents the
	      function public_key:pkix_path_validation/3

   OTP-10665  Some examples overflowing the width of PDF pages have been
	      corrected.

   OTP-10670  Fix subjectPublicKeyInfo type comment in public_key. Thanks
	      to Ryosuke Nakai.

   OTP-10723  Fixed typo's in public_key spec.

   OTP-10767  Corrected PKCS-10 documentation and added some PKCS-9 support
	      that is fairly commonly used by PKCS-10. Full support for
	      PKCS-9 will be added later.


--- reltool-0.6.2 -------------------------------------------------------

   OTP-10012  -- If incl_cond was set to derived on module level, then
	      reltool_server would crash with a case_clause. This has been
	      corrected. incl_cond on module level now overwrites mod_cond
	      on app or sys level as described in the documentation.

	      -- If a rel spec in the reltool config does not contain all
	      applications that are listed as {applications,Applications}
	      in a .app file, then these applications are autmatically
	      added when creating the .rel file. For
	      'included_applications', the behaviour was not the same. I.e.
	      if a rel spec in the reltool config did not contain all
	      applications that are listed as
	      {included_applications,InclApplications} in a .app file, then
	      reltool would fail with reason "Undefined applications" when
	      creating the .rel file. This has been corrected, so both
	      applications and included_applications are now automatically
	      added if not already in the rel spec.

	      -- The rel specification now dictates the order in which
	      included and used applications (specified in the .app file as
	      included_applications and applications respectively) are
	      loaded/started by the boot file. If the applications are not
	      specified in the rel spec, then the order from the .app file
	      is used. This was a bug earlier reported on systools, and is
	      now also implemented in reltool. 

	      -- Instead of only looking at the directory name, reltool now
	      first looks for a .app file in order to figure out the name
	      of an application.

   OTP-10665  Some examples overflowing the width of PDF pages have been
	      corrected.


--- runtime_tools-1.8.10 ------------------------------------------------

   OTP-10155  User Guides for the dynamic tracing tools dtrace and
	      systemtap have been added to the documentation.

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.

   OTP-10635  Fix Table Viewer refresh crash on no more existing ets tables
	      (Thanks to Peti Gömori)

   OTP-10665  Some examples overflowing the width of PDF pages have been
	      corrected.

   OTP-10786  The backend module appmon_info.erl is moved from appmon
	      application to runtime_tools. This allows appmon to be run
	      from a remote erlang node towards a target node which does
	      not have appmon (and its dependencies) installed, as long as
	      runtime_tools is installed there.


--- sasl-2.3 ------------------------------------------------------------

   OTP-10394  release_handler_SUITE:otp_9864 deleted parts of the
	      release_handler_SUITE_data directory so the test suite could
	      not be executed twice without re-installation. This has been
	      corrected.

   OTP-10417  It is no longer possible to have {Mod,Vsn} in the 'modules'
	      list in a .app file.

	      This was earlier possible, although never documented in the
	      .app file reference manual. It was however visible in the
	      documentation of application:load/[1,2], where the same term
	      as in a .app file can be used as the first argument.

	      The possibility has been removed since the Vsn part was never
	      used.

   OTP-10463  release_handler:upgrade_script and
	      release_handler:downgrade_script could not read appup files
	      with regexps. This has been corrected. (Thanks to Ulf Wiger)

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.


--- snmp-4.23 -----------------------------------------------------------

   OTP-10027  [manager] Remove deprecated functions.

   OTP-10610  Fix typo in snmpm doc (Thanks to Luca Favatella)

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.

   OTP-10671  Polish return values of snmpm_user_default according to
	      snmpm_user doc.

   OTP-10672  Remove runtime warning in snmpa_agent because of tuple fun
	      usage.

   OTP-10673  SNMP manager performance optimization


--- ssh-2.1.2 -----------------------------------------------------------

   OTP-10657  Fixed various syntax errors in SSH appup file


--- ssh-2.1.3 -----------------------------------------------------------

    OTP-6406  SSH_FX_FILE_IS_A_DIRECTORY message for sftp implemented

    OTP-7785  SSH Rekeying fixed

    OTP-7786  Added User Guide for the SSH application

    OTP-7792  Documentation regarding failfun, connectfun and disconnectfun
	      provided

    OTP-9478  It is now possible to send an empty binary using
	      ssh_connection:send/3, this corner case previously caused
	      ssh_connection:send to hang.

   OTP-10456  Fix typo in keyboard-interactive string. Thanks to Daniel
	      Goertzen

   OTP-10467  ssh_connectino:send/3 will not return until all data has been
	      sent. Previously it could return too early, resulting in
	      things such premature close of the connection. Also improved
	      error handling of closed SSH channels.

   OTP-10475  Fixed ssh_cli.erl crashes because #state.buf is yet
	      'undefined'.

	      Fixed Client terminateing connections due to channel_request
	      message response is sent to the wrong id.

	      Affected SSH clients: - all clients based on
	      SSH-2.0-TrileadSSH2Java_213 (problem #1) - SSH Term Pro
	      (problem #2)

	      Thanks to Stefan Zegenhagen

   OTP-10514  SSH connection timer implementation

	      New option, {idle_time, integer()}, sets a timeout on
	      connection when no channels are active, defaults to infinity

   OTP-10665  Some examples overflowing the width of PDF pages have been
	      corrected.

   OTP-10731  Fixed internal error on when client and server can not agree
	      o which authmethod to use.


--- ssl-5.1.2 -----------------------------------------------------------

   OTP-10600  ssl:ssl_accept/2 timeout is no longer ignored


--- ssl-5.2 -------------------------------------------------------------

   OTP-10361  Support Next Protocol Negotiation in TLS, thanks to Ben
	      Murphy for the contribution.

	      Impact: Could give performance benefit if used as it saves a
	      round trip.

   OTP-10425  TLS 1.2 will now be the default TLS version if sufficient
	      crypto support is available otherwise TLS 1.1 will be
	      default.

	      Impact: A default TLS connection will have higher security
	      and hence it may be perceived as slower then before.

   OTP-10447  It is now possible to call controlling_process on a listen
	      socket, same as in gen_tcp.

   OTP-10451  Remove filter mechanisms that made error messages backwards
	      compatible with old ssl but hid information about what
	      actually happened.

	      This does not break the documented API however other reason
	      terms may be returned, so code that matches on the reason
	      part of {error, Reason} may fail.

   OTP-10586  SSL: TLS 1.2, advertise sha224 support, thanks to Andreas
	      Schultz.

   OTP-10594  Added missing dependencies to Makefile

   OTP-10595  If an ssl server is restarted with new options and a client
	      tries to reuse a session the server must make sure that it
	      complies to the new options before agreeing to reuse it.

   OTP-10613  Removed deprecated function ssl:pid/0, it has been pointless
	      since R14 but has been keep for backwards compatibility.

   OTP-10709  Refactor to simplify addition of key exchange methods, thanks
	      to Andreas Schultz.

   OTP-10710  Now handles cleaning of CA-certificate database correctly so
	      that there will be no memory leek, bug was introduced in ssl-
	      5.1 when changing implementation to increase parallel
	      execution.

	      Impact: Improved memory usage, especially if you have many
	      different certificates and upgrade tcp-connections to
	      TLS-connections.


--- stdlib-1.19 ---------------------------------------------------------

    OTP-6874  Wildcards such as "some/path/*" passed to filelib:wildcard/2
	      would fail to match any file. (Thanks to Samuel Rivas for
	      reporting this bug.)

    OTP-9803  Fixed error handling in proc_lib:start which could hang if
	      the spawned process died in init.

   OTP-10097  Dets tables are no longer fixed while traversing with a bound
	      key (when only the objects with the right key are matched).
	      This optimization affects the functions match/2,
	      match_object/2, select/2, match_delete/2, and
	      select_delete/2.

   OTP-10302  Support for Unicode has been implemented.

   OTP-10431  Allow ** in filelib:wildcard

	      Two adjacent * used as a single pattern will match all files
	      and zero or more directories and subdirectories. (Thanks to
	      José Valim)

   OTP-10436  The linter now warns for opaque types that are not exported,
	      as well as for under-specified opaque types.

   OTP-10455  Add the \gN and \g{N} syntax for back references in
	      re:replace/3,4 to allow use with numeric replacement strings.
	      (Thanks to Vance Shipley)

   OTP-10472  Export ets:match_pattern/0 type (Thanks to Joseph Wayne
	      Norton)

   OTP-10474  The type file:name() has been substituted for the type
	      file:filename() in the following functions in the filename
	      module: absname/2, absname_join/2, join/1,2, and split/1.

   OTP-10490  If a child process fails in its start function, then the
	      error reason was earlier only reported as an error report
	      from the error_handler, and supervisor:start_link would only
	      return {error,shutdown}. This has been changed so the
	      supervisor will now return {error,{shutdown,Reason}}, where
	      Reason identifies the failing child and its error reason.
	      (Thanks to Tomas Pihl)

   OTP-10504  Fix printing the empty binary at depth 1 with ~W (Thanks to
	      Andrew Thompson)

   OTP-10624  The type ascii_string() in the base64 module has been
	      corrected. The type file:file_info() has been cleaned up. The
	      type file:fd() has been made opaque in the documentation.

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.

   OTP-10658  The contracts and types of the modules erl_scan and sys have
	      been corrected and improved. (Thanks to Kostis Sagonas.)

   OTP-10659  The Erlang shell now skips the rest of the line when it
	      encounters an Erlang scanner error.

   OTP-10663  Clean up some specs in the proplists module. (Thanks to
	      Kostis Sagonas.)

   OTP-10665  Some examples overflowing the width of PDF pages have been
	      corrected.

   OTP-10691  Enable escript to accept emulator arguments when script file
	      has no shebang. Thanks to Magnus Henoch

   OTP-10722  Fix bug in queue:out/1, queue:out_r/1 that makes it O(N^2) in
	      worst case. Thanks to Aleksandr Erofeev.

   OTP-10742  There are new functions in the epp module which read the
	      character encoding from files. See epp(3) for more
	      information.

   OTP-10745  The functions in io_lib have been adjusted for Unicode. The
	      existing functions write_string() and so on now take Unicode
	      strings, while the old behavior has been taken over by new
	      functions write_latin1_string() and so on. There are also new
	      functions to write Unicode strings as Latin-1 strings, mainly
	      targetted towards the Erlang pretty printer (erl_pp).

   OTP-10749  The new functions proc_lib:format/2 and erl_parse:abstract/2
	      accept an encoding as second argument.

   OTP-10787  Increased potential concurrency in ETS for write_concurrency
	      option. The number of internal table locks has increased from
	      16 to 64. This makes it four times less likely that two
	      concurrent processes writing to the same table would collide
	      and thereby serialized. The cost is an increased constant
	      memory footprint for tables using write_concurrency. The
	      memory consumption per inserted record is not affected. The
	      increased footprint can be particularly large if
	      write_concurrency is combined with read_concurrency.


--- syntax_tools-1.6.10 -------------------------------------------------

   OTP-10302  Support for Unicode has been implemented.


--- test_server-3.6 -----------------------------------------------------

    OTP-9710  Line numbering of erlang files that were not correctly
	      indented could be wrong after coverting to html with
	      erl2html2:convert/[2,3] (the source code pointed to from the
	      test case). This has been corrected.

	      Also, there are now link targets for each line and not only
	      for each 10th line, and link targets for functions now
	      include the arity and not only the function name (e.g. func/1
	      has a link target "func-1").

    OTP-9769  Severe errors detected by test_server (e.g. if log files
	      directories cannot be created) will now be reported to
	      common_test and noted in the common_test logs.

    OTP-9870  The earlier undocumented cross cover feature for accumulating
	      cover data over multiple tests has now been fixed and
	      documented.

    OTP-9956  If the test suite itself was included in code coverage
	      analysis, then the test_server would not manage to set
	      data_dir correctly for the test. This has been corrected.

   OTP-10046  Any call to test_server:break/1 should cancel all active
	      timetramps. However, in some cases Suite:end_per_testcase/2
	      is executed on a different process than the test case itself,
	      and if test_server:break/1 was called from there, the
	      timetraps were not cancelled. This has been corrected.

   OTP-10070  When a test case failed because of a timetrap time out, the
	      Config data for the case was lost in the following call to
	      end_per_testcase/2, and also in calls to the CT Hook function
	      post_end_per_testcase/4. This problem has been solved and the
	      Config data is now correctly passed to the above functions
	      after a timetrap timeout failure.

   OTP-10101  In test_server, the same process would supervise the
	      currently running test case and be group leader (and IO
	      server) for the test case. Furthermore, when running parallel
	      test cases, new temporary supervisor/group leader processes
	      were spawned and the process that was group leader for
	      sequential test cases would not be active. That would lead to
	      several problems:

	      * Processes started by init_per_suite will inherit the group
	      leader of the init_per_suite process (and that group leader
	      would not process IO requests when parallel test cases was
	      running). If later a parallel test case caused such a
	      processto print using (for example) io:format/2, the calling
	      would hang.

	      * Similarly, if a process was spawned from a parallel test
	      case, it would inherit the temporary group leader for that
	      parallel test case. If that spawned process later - when the
	      group of parallel tests have finished - attempted to print
	      something, its group leader would be dead and there would be
	      badarg exception.

	      Those problems have been solved by having group leaders
	      separate from the processes that supervises the test cases,
	      and keeping temporary group leader process for parallel test
	      cases alive until no more process in the system use them as
	      group leaders.

	      Also, a new unexpected_io.log log file (reachable from the
	      summary page of each test suite) has been introduced. All
	      unexpected IO will be printed into it(for example, IO to a
	      group leader for a parallel test case that has finished).

   OTP-10156  Added a general framework for executing benchmarks of
	      Erlang/OTP. Benchmarks for the Erlang VM and mnesia have been
	      incorporated in the framework. 

	      For details about how to add more benchmarks see
	      $ERL_TOP/HOWTO/BENCHMARKS.md in the source distribution.

   OTP-10480  The stability of common_test and test_server when running
	      test cases in parallel has been improved.

   OTP-10783  Update common test modules to handle unicode

	      -- Use UTF-8 encoding for all HTML files, except the HTML
	      version of the test suite generated with erl2html2:convert,
	      which will have the same encoding as the original test suite
	      (.erl) file.

	      -- Encode link targets in HTML files with
	      test_server_ctrl:uri_encode/1.

	      -- Use unicode modifier 't' with ~s when appropriate.

	      -- Use unicode:characters_to_list and
	      unicode:characters_to_binary for conversion between binaries
	      and strings instead of binary_to_list and list_to_binary.


--- toolbar-1.4.2.3 -----------------------------------------------------

   OTP-10784  Misc build updates


--- tools-2.6.9 ---------------------------------------------------------

   OTP-10302  Support for Unicode has been implemented.

   OTP-10465  Make erlang-mode more compatible with package.el (Thanks to
	      Gleb Peregud)

   OTP-10523  A new function, cover:flush(Nodes), is added which will fetch
	      data from remote nodes without stopping cover on those nodes.
	      This is used by test_server and common_test when it is safe
	      to assume that the node will be terminated after the test
	      anyway. The purpose is to avoid processes crashing when
	      re-loading the original beam if the processes is still
	      running old code.

	      Remote nodes will now continue to count code coverage if the
	      connection to the main node is broken. Earlier, a broken
	      connection would cause the cover_server on the remote node to
	      die and thus any still cover compiled modules would cause
	      process crash when trying to insert cover data in ets tables
	      that used to exist on the cover_server. The new functionality
	      also involves synchronization with the main node if the nodes
	      are reconnected.

   OTP-10611  Fix various typos (thanks to Tuncer Ayaz)

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.

   OTP-10637  Add separate face for exported functions (Thanks to Thomas
	      Järvstrand)

   OTP-10766  Fix syntax highlighting of $\' in Emacs mode. Thanks to
	      Magnus Henoch.

   OTP-10774  The BIF highlighting in the emacs mode has been updated to
	      correspond with the correct BIFs.


--- tv-2.1.4.10 ---------------------------------------------------------

   OTP-10784  Misc build updates


--- typer-0.9.5 ---------------------------------------------------------

   OTP-10784  Misc build updates


--- webtool-0.8.9.2 -----------------------------------------------------

   OTP-10784  Misc build updates


--- wx-1.0 --------------------------------------------------------------

   OTP-10407  The wx application now compiles and is usable with the
	      unstable development branch of wxWidgets-2.9. Some functions
	      are currently not available in wxWidgets-2.9 and their erlang
	      counterparts are marked as deprecated. They will generate an
	      error if called when linked against wxWidgets-2.9 libraries.
	      This means that wx can now be built on 64bit MacOsX, but keep
	      in mind that wxWidgets-2.9 is still a development branch and
	      needs (a lot) more work before it becomes stable.

   OTP-10585  Add {silent_start, boolean()} option to wx:new/1 in order to
	      be able to suppress error messages during startup of wx.
	      (Thanks to Hĺkan Mattsson)

   OTP-10743  Fix wxTreeCtrl:getBoundingRect/2 and wxTreeCtrl:hitTest/1.
	      wxTreeCtrl:hitTest now returns a tuple not bug compatible
	      with previous releases but needed.


--- xmerl-1.3.3 ---------------------------------------------------------

   OTP-10630  Where necessary a comment stating encoding has been added to
	      Erlang files. The comment is meant to be removed in
	      Erlang/OTP R17B when UTF-8 becomes the default encoding.

   OTP-10665  Some examples overflowing the width of PDF pages have been
	      corrected.