Use correct type for thinktime
mint-arena: Make EV_USE_ITEMx a single switch case in cgame

Add EV_USE_ITEM15 in CG_EntityEvent and BotCheckEvents.
Made EV_DEATH[123] show number in cg_debugevents printf.
mint-arena: Remove some unused struct members and LTG_* defines
mint-arena: Make missionpack cvars with SERVERINFO using SYSTEMINFO

g_enableDust, g_enableBreath, and g_obeliskRespawnDelay aren't needed in server browsers.
mint-arena: Make STAT_* values the same in q3 and team arena
Merge remote-tracking branch 'mint-arena/master'

Conflicts:
	code/cgame/cg_ents.c
	code/cgame/cg_main.c
	code/cgame/cg_servercmds.c
	code/game/ai_dmq3.c
	code/game/bg_misc.c
	code/game/bg_public.h
	code/game/g_main.c
	code/game/g_team.c
ebx: Remove (unused) missileRenderfx from projectileInfo_t
ebx: Make g_2dmode be SYSTEMINFO, not needed in server browsers
ebx: Save game cvar clean up

Some it was left over from having loadgame command in engine.
ebx: Readd g_saveFilename cvar

I didn't see it was used in UI because different string case.
Thanks git grep. >.>
ebx: Don't require vmcvar in UI cvar tables (fixes last commit)
Merge remote-tracking branch 'ebx/master'