Improve customisability of rotatelogs' behaviour.  Allow the
	logfile name to be formatted according to strftime(3), and
	let the user specify an offset from UTC.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@88510 13f79535-47bb-0310-9956-ffa450edef68