Change XOR mask for login_id; #63

Otherwise it will always clash with the Steam client running on the same machine.
That was the default behaviour before login_id was implemented.

steam/client/__init__.py

@@ -490,7 +490,7 @@ class SteamClient(CMClient, BuiltinBase):
         message.body.supports_rate_limit_response = True
 
         if login_id is None:
-            message.body.obfustucated_private_ip = ip_to_int(self.connection.local_address) ^ 0xBAADF00D
+            message.body.obfustucated_private_ip = ip_to_int(self.connection.local_address) ^ 0xF00DBAAD
         else:
             message.body.obfustucated_private_ip = login_id