Add Ogg Vorbis support (required to connect to some OpenArena servers)

[Calinou]

It looks like Quake3e doesn't support Ogg Vorbis unlike ioquake3, which prevents connecting to servers hosting some OpenArena mods such as rat. See https://github.com/ec-/Quake3e/issues/197 for context.

cg_registerSounds(): Engine does not support Ogg Vorbis

The server aborts connection as (I assume) it's a pure server, so your client must be able to load the audio somehow.

While no Quake 3 mod makes use of Ogg Vorbis to my knowledge, this is absolutely required connect to some OpenArena servers.

[ensiform]

Nor OpenAL.

[ghost]

@Calinou you can use the OmegA-engine if you want: https://github.com/EddieBrrrock/OmegA-engine
@EddieBrrrock implemented OpenAL and OGG vorbis into Q3e, the OmegA-engine works well with rat mod etc., and his fork is up-to-date with current master Q3e. There are other Q3e forks with OpenAL implemented, for example: https://github.com/ivanka2012 and all the UrbanTerror Q3e forks (those even come with dmaHD).
Btw, implementing OpenAL into Q3e isn't that hard to manage, I just don't know HOW the developers want to have it implemented. https://github.com/ec-/Quake3e/issues/33
Anyways try the OmegA-engine meanwhile.

[ec-]

Ogg support from @EddieBrrrock looks clean as for me, I'll try to find some time backporting it to q3e

[ec-]

Please check current implementation