Re-enable Global Sound Pickups on CVAR
When playing CTF on competition, pickup sounds are needed to ensure a correct play on games.
Odamex disables it automatically to ensure DooM2.exe original behaviour, but since this is mainly needed for some enhancements...
(Patch given with 2/3 little servers)
So, as of 24889a9 this is sort of in with co_globalsound. However, it plays the pickup sound at full volume for some reason instead of playing like a normal sound. That needs to be fixed and then it is good to go.