Add a new module, cdr_syslog, which allows writing CDRs to syslog.

The original patch for this was written by Brett Bryant, and I split it out into
it's own module.

(closes issue #12876)
Reported by: bbryant
Patches:
      06162008_cdr_custom_syslog.diff uploaded by bbryant (license 36)
      05212009_cdr_syslog.patch uploaded by seanbright (license 71)
Tested by: seanbright

Review: https://reviewboard.asterisk.org/r/297/


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@203846 65c4cc65-6c06-0410-ace0-fbb531ad65f3