By default, xbmc is listening on deprecated lirc socket.
Sync xbmc.service with upstream to listen on /run/lirc/lircd.

Add polkit rules to allow xbmc group to manage power and udisks.
Add polkit.rules and remove xinit from service.
Polkit rules, take 3.
Merge pull request #659 from vulpesvelox/lirc_socket

Fix lirc socket and allow xbmc group members to manage power and drives