Fix quit not quitting on arguments

scripts/menu.gd

@@ -52,5 +52,5 @@ func _arg_actions():
 		_singleplayer()
 	if o.get_value('-h'):
 		o.print_help()
-		quit()
+		get_tree().quit()
 

scripts/networking.gd

@@ -172,7 +172,6 @@ sync func _pre_configure_game(level):
 	# This causes a stack overflow if we call it from here repeatedly
 	# So we only change it once, only start_game twice, and avoida segfault
 	if not self_begun:
-		print("setting my begun to true")
 		set_info("begun", true)
 	rpc_id(1, "_done_preconfiguring", self_peer_id)