weekend rsyslog work log

Past two day's rsyslog work log: 2008-01-26 - improved SIGSEGV handler a bit (now we get a core dump) - partially fixed bug that caused rsyslogd to stall processing enqueued messages after turning off DA mode and before any new message were arrived (if a new message arrived, everything went back to normal, so it was a temporary halt) 2008-01-27 - fixed the situation where message processing could be stalled for some period after DA mode turn off - reduced number of unnecessary wakeups of DA worker thread when high water mark is not yet reached - fixed a cosmetic issue in timeoutValue calculation (just used for displaying) - fixed a bug when shutting down DA queue - some more fixing and cleanup on the queue shutdown sequence - fixed queue termination in case bSaveOnShutdown is 0 - implemented the $MainMsgQueueSaveOnShutdown config directive - implemented the $MainMsgQueueWorkerThreadMinimumMessages config directive - implemented the $MainMsgQueueTimeoutWorkerThreadShutdown config directive