GS4 Query handler (#20)

proxy/src/main/resources/velocity.toml

@@ -38,4 +38,11 @@ try = [
 compression-threshold = 1024
 
 # How much compression should be done (from 0-9). The default is -1, which uses zlib's default level of 6.
-compression-level = -1
+compression-level = -1
+
+[query]
+# Whether to enable responding to GameSpy 4 query responses or not
+enabled = false
+
+# If query responding is enabled, on what port should query response listener listen on?
+port = 25577