Make message origin hint configurable
The logging FileBackend currently adds a hint about where the message was created for every log entry. While this feature can be useful in certain situations, it clutters the log file for the rest of us.
Thus this feature should be configurable and be disabled by default.
[FEATURE] Configurable hint about log message origin
This feature allows for enabling the additional hint for the origin of
logged messages handled by the FileBackend. By default these hints are