- New since 1.9.0:
    -
    -        Nothing.
    -
    - Bugs fixed since 1.9.0
    -
    -        The dns.dnssec module didn't work with DSA due to namespace
    -        contamination from a "from"-style import.
    -
    - New since 1.8.0:
    -
    -        dnspython now uses poll() instead of select() when available.
    -
    -        Basic DNSSEC validation can be done using dns.dnsec.validate()
    -        and dns.dnssec.validate_rrsig() if you have PyCrypto 2.3 or
    -        later installed.  Complete secure resolution is not yet
    -        available.
    -
    -        Added key_id() to the DNSSEC module, which computes the DNSSEC
    -        key id of a DNSKEY rdata.
    -
    -        Added make_ds() to the DNSSEC module, which returns the DS RR
    -        for a given DNSKEY rdata.
    -
    -        dnspython now raises an exception if HMAC-SHA284 or
    -        HMAC-SHA512 are used with a Python older than 2.5.2.  (Older
    -        Pythons do not compute the correct value.)
    -
    -        Symbolic constants are now available for TSIG algorithm names.
    -
    - Bugs fixed since 1.8.0
    -
    -        dns.resolver.zone_for_name() didn't handle a query response
    -        with a CNAME or DNAME correctly in some cases.
    -
    -        When specifying rdata types and classes as text, Unicode
    -        strings may now be used.
    -
    -        Hashlib compatibility issues have been fixed.
    -
    -        dns.message now imports dns.edns.
    -
    -        The TSIG algorithm value was passed incorrectly to use_tsig()
    -        in some cases.