- Switch master server protocol to dpmaster for better game separation. Based partly on patch by Zack Middleton

- Get rid of ugly cvars sv_heartbeat and cl_gamename and replace with single com_gamename
- Remove sv_flatline. Flatlines are ignored by dpmaster and are considered to be insecure because flatlines can be udp-spoofed.

code/server/server.h

@@ -294,8 +294,6 @@ extern	cvar_t	*sv_lanForceRate;
 extern	cvar_t	*sv_strictAuth;
 #endif
 extern	cvar_t	*sv_banFile;
-extern	cvar_t	*sv_heartbeat;
-extern	cvar_t	*sv_flatline;
 
 extern	serverBan_t serverBans[SERVER_MAXBANS];
 extern	int serverBansCount;