OpenArena crossplay 3DS/PC PoC

No real reason to do this ....

3DS ioQuake was released in 2019 with support coming for openarena in v1.1.0 
released late 2019.

See: 
- https://gbatemp.net/threads/release-quake-iii-ioquake3ds.532255/
- https://github.com/masterfeizz/ioQuake3DS/releases/tag/v1.1.0

The current 0.8.8 OpenArena release runs Protocol 71 but the ioQuake engine 
still runs on protocol 68 (q3 intro'd in 1.31), this breaks crossplay between 
(uptodate) pc and 3DS and/or pc based dedicated servers.

OpenArena still ran protocol 68 until v0.7.6 so the obvious thing to do would 
be to setup a 0.7.6 server, doing so allows connection by the 3DS release to 
connect but then throws a game folder error because of missing resources on the
client.

You need 
- the 3DS release 
- 0.7.6 data for all clients (baseoa folder)
- 0.7.6 dedicated/listen server
- 0.7.6 PC clients

then crossplay works well enough for fun sessions

0.7.6 pc version: http://download.tuxfamily.org/openarena/rel/076/oa076.zip

PC dedicated server launch test command

./oa_ded.x86_64 +set dedicated 1 +g_gametype 2 +map q3dm6ish


@sairukau