- Use select() to sleep when idle as opposed to busy waiting.

- Introduce com_busyWait cvar to go back to old behaviour

code/null/null_net.c

@@ -51,14 +51,3 @@ Sys_SendPacket
 */
 void Sys_SendPacket( int length, void *data, netadr_t to ) {
 }
-
-/*
-==================
-Sys_GetPacket
-
-Never called by the game logic, just the system event queing
-==================
-*/
-qboolean	Sys_GetPacket ( netadr_t *net_from, msg_t *net_message ) {
-	return false;
-}