Add connection_lost. Properly handle shutdown of watch_q.

magneticod/magneticod/__main__.py

@@ -61,7 +61,7 @@ def main():
         database.close()
         watch_q_task.cancel()
         loop.run_until_complete(node.shutdown())
-        loop.run_until_complete(watch_q_task)
+        loop.run_until_complete(asyncio.wait([watch_q_task]))
 
     return 0
 

magneticod/magneticod/dht.py

@@ -62,6 +62,9 @@ class SybilNode:
         self._tasks.append(self._loop.create_task(self.increase_neighbour_task()))
         self._transport = transport
 
+    def connection_lost(self, exc):
+        self._is_paused = True
+
     def pause_writing(self):
         self._is_paused = True