improve connection timeout handling

owrx/connection.py

@@ -16,7 +16,7 @@ from owrx.waterfall import WaterfallOptions
 from owrx.websocket import Handler
 from queue import Queue, Full, Empty
 from js8py import Js8Frame
-from abc import ABC, ABCMeta, abstractmethod
+from abc import ABCMeta, abstractmethod
 import json
 import threading
 
@@ -517,6 +517,7 @@ class HandshakeMessageHandler(Handler):
                     logger.warning("invalid connection type: %s", handshake["type"])
 
             if client is not None:
+                logger.debug("handing off connection handling to %s", type(client).__name__)
                 # hand off all further communication to the correspondig connection
                 conn.send("CLIENT DE SERVER server=openwebrx version={version}".format(version=openwebrx_version))
                 conn.setMessageHandler(client)