Firewall Check on HOST a game is not anymore needed.

src/netmenu.c

@@ -142,10 +142,7 @@ multiplayer_firstrun ()
  * We will host a network game
  */
 void host_multiplayer_game () {
-	if (bman.firewall) {
-		menu_displaymessage("Error", "You can not start a network game\nwith the firewall option on.");
-		return;
-	}
+	bman.firewall = 0;
 	multiplayer_firstrun ();
 
     if (network_init () < 0) {