Minor fs_game-related code clean up in files.c
Fix getting servers from and being listed on id's q3 master server

Use q3 master protocol when com_gamename is Quake3Arena (the default), otherwise use dpmaster protocol.
(bug #5984) Unload renderer lib
Ignore ioq3 commit 6b1380.

"Fix getting servers from and being listed on id's q3 master server"
Merge remote-tracking branch 'ioquake3/master'

Conflicts:
	code/client/cl_main.c