Remote logging of topics

When configuring a remote log server, there are two possible modes:

  • normal mode: the topic field logline is sent to syslog server but there is no control over facility and severity
  • BSD mode: it is possible to define a facility and the severity is derived from the topic field (or can be manually set), however the topic field is not sent to the syslog server

Please make these options independent, so it is possible to send logs in BSD mode (with manually defined facility and severity as it is set now), but still include the topic field in the log message.
This enables the use of automatic matching of the topic field in the syslog server while still using a facility field to direct the log messages inside that server.