mint-arena: Stop caching sv_maxclients in bot code
mint-arena: Allow VMs to decide expected size of entity state network data

This would be required for supporting older demos with less entity state fields.
mint-arena: Replace G_SET_BRUSH_MODEL with G_GET_BRUSH_BOUNDS

Most of SV_SetBrushModel can be done in Game VM, so move it there.
mint-arena: Add support for engine to notify CGame that glconfig changed

Called when r_fullscreen is changed if fast toggle is done instead of vid_restart.
Called when window is resized (r_allowResize 1 and drag window edge).
mint-arena: Storing ready players at intermission in configstring

It use to be stored in player state and only supported clientNums 0-15.
Also fixes cgame issue of only checking player state 0, which may not exist (zero'd memory).

Com_ClientListParse was changed to be able to parse output of Com_ClientListString.
mint-arena: Don't hard code weapon names for bot chat
mint-arena: Register bot_testichat cvar

Makes it show in cvarlist and able to auto-complete it.
mint-arena: Support ctflocation if teamlocation does not exist

Q3 pak4.pk3 renamed "ctflocation" in botfiles/teamplay.h to "teamlocation".
(because of new Team Arena gamemodes.)

Q3 demo and Elite Force still use ctflocation, so fallback to 'ctflocation'
if there are no 'teamlocation' chats.

However, pak4.pk3 broke match.c compatibility so need to remove EC from
chat message in Game VM for bot to notice you're talking to it. Ideally
I'll remove the need to do this later.
Merge remote-tracking branch 'mint-arena/master'