Rename admin and limit failed logins

Increase the logging to subsonic.log so It includes users logged in and failed tries with ip.
As techsc writes in this post: http://forum.subsonic.org/forum/viewtopic.php?t=2944
Security Policies should be implemented.
As techsc writes in this post: http://forum.subsonic.org/forum/viewtopic.php?t=2944
Security Policies should be implemented.