Various bugfixes by Tobias Kuehnhammer (#5270)

- A stupid bug where bots re-trigger jumppads if they fell onto it.
- A small "memset" bug concerning player animations.
- Reward sounds were never cleared and thus they are played on a map restart.
- Safer and more secure handling of disconnected clients and clients with 
  malformed or illegal info strings.
- first_gauntlet_hit.wav was not played (ops/ps) bug
- capturelimit not hit (from OAX)

code/game/g_main.c

@@ -1363,10 +1363,6 @@ void CheckExitRules( void ) {
 		}
 	}
 
-	if ( level.numPlayingClients < 2 ) {
-		return;
-	}
-
 	if ( g_gametype.integer < GT_CTF && g_fraglimit.integer ) {
 		if ( level.teamScores[TEAM_RED] >= g_fraglimit.integer ) {
 			trap_SendServerCommand( -1, "print \"Red hit the fraglimit.\n\"" );