Proper logfiles sorting

Custom sorting added, natural logfiles order:

	/var/log/logfile.log
	/var/log/logfile.log.gz
	/var/log/logfile.log.0
	/var/log/logfile.log.1
	/var/log/logfile.log.2.bz2
	/var/log/logfile.log.3
	/var/log/logfile.log.4
	/var/log/logfile.log.5
	/var/log/logfile.log.6
	/var/log/logfile.log.7
	/var/log/logfile.log.8.gz
	/var/log/logfile.log.9
	/var/log/logfile.log.10
	/var/log/logfile.log.11