Ticket 471 - logconv.pl tool removes the access logs contents if "-M" is not correctly used
Bug Description: If you fail to specifiy the output file, the access log is overwritten.
Fix Description: Check if the proper files have been provbided to the script, and report error otherwise.
https://fedorahosted.org/389/ticket/471
Reviewed by: nhosoi(Thanks!)
(cherry picked from commit 89fb3420c9137cb2c9813fec527b89fec3b6d63e)