Log Message:
Update syslog-ng to the latest stable 3.7.2 version.
Rework and clean up the package, split off various bindings
into separate packages. Add SMF support.

Major features and improvements introduced in major releases since 3.2.

3.7
- OpenSSL is now a required dependency for syslog-ng.
- Java-destination driver ported from syslog-ng-incubator.
- Python language support is ported from syslog-ng incubator.
- New Java destination drivers
- New Parsers

3.6
- PCRE is now a required dependency of syslog-ng.
- Threaded mode is now enabled by default.

3.5
- Multi-line support
- STOMP destination
- Redis destination
- Template type hinting
- Template options honored everywhere
- Support for unit suffixes in the configuration
- The Incubator project

3.4
- New plugins: AMQP & SMTP destinations, JSON parser.
- New parsers for patterndb: HOSTNAME, EMAIL, PCRE and LLADDR.
- It is now possible to control what db-parser() sees as its input
  via it's new template() option.
- value-pairs() gained support for programmatically
  rewriting key names in bulk, via the rekey() method.
- The network() driver is introduced, unifying and extending
  tcp(), udp(), syslog(), unix-dgram() and
  unix-stream(). The old drivers are still available, but
- Support for junctions & channels were added, which improve
  the flexibility of the syslog-ng configuration language.

3.3
- multi-core/CPU scaling: the new multi-threaded architecture allows
  syslog-ng to scale into the 800k msg/sec region.
- MongoDB support: using MongoDB instead of SQL is faster and
  allows better representation of log data.
- JSON support: using the $(format-json) template function it is
  now possible to construct JSON (JavaScript Object Notation)
  output for log messages.
- A number of enhancements all over the place: SQL, patterndb.
- The default ports have changed. syslog-ng is using the standard