Fix issue where the socket doesn't get forgotten and causes 100% load.

gbulb/transports.py

@@ -72,7 +72,7 @@ def _force_close_async(self, exc):
             self._protocol.connection_lost(exc)
         finally:
             if self._sock is not None:
-                self._sock.close()
+                self._sock.detach()
                 self._sock = None
             if self._server is not None:
                 self._server._detach()