Message 100845 - Python tracker

Screnario:
 - start logging, log something;
 - stop logging (stop application, for example);
 - start logging again after rotate interval passes.

log4j's RotatingFileAppender's behavior:
After restart, logfile is rotated if nessesary.

TimedRotatingFileHandler's behavior:
After restart do no checks on existing logs.

I thing, log4j's behavior is more intuitive. Patch adds necessary check to constructor.