Put back timestamps and mAppName when logging to Syslog (mAppName to be configurable from repro)

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10007 ddefafc4-47db-0310-ae44-fa13212b10f2
repro: add LoggingInstanceName config option

git-svn-id: https://svn.resiprocate.org/rep/resiprocate/main@10008 ddefafc4-47db-0310-ae44-fa13212b10f2