Add afpfs support

I haven't tested this beyond checking if there are any errors in the log
when enabling the AFP service.
I'm sure some will appreciate the option but the fact remains NFS and
SMB are preferable due to reliability.
http://wiki.xbmc.org/index.php?title=AFP

http://appleinsider.com/articles/13/06/11/apple-shifts-from-afp-file-sharing-to-smb2-in-os-x-109-mavericks

Plus small changes to mysql and python.