- update for syslog-ng 3.1.1
    - supports the new syslog protocol standards
    - log statements can be embedded into each other
    - the encoding of source files can be set for proper character conversion
    - can read, process, and rewrite structured messages (e.g., Apache
        webserver logs) using templates and regular expressions
    - support for patterndb v2 and v3 format, along with a bunch of new
        parsers: ANYSTRING, IPv6, IPvANY and FLOAT.
    - added a new "pdbtool" utility to manage patterndb files: convert them
        from v1 or v2 format, merge mulitple patterndb files into one and look
        up matching patterns given a specific message.
    - support for message tags: tags can be assigned to log messages as they
        enter syslog-ng: either by the source driver or via patterndb. Later it
        these tags can be used for efficient filtering.
    - added support for rewriting structured data
    - added pcre support in the binary packages of syslog-ng