Add TIXI24 log rotation
Add TIXI24 log rotation

TIXI24 logs are kept one week and then rotated max 4 times. Older logs
are deleted. The log “depth” is 4..5 weeks. This closes
TIXI24/requirement issue#58.

TIXI24/sfitixi,TIXI24/sfitixi,TIXI24/sfitixi,hertus/sfitixi,hertus/sfitixi,hertus/sfitixi,TIXI24/sfitixi,hertus/sfitixi