message: chore: amend a log message which could cause users to be panic
diff: @@ -1085,10 +1085,11 @@ impl<T: ExitHandler> NetworkService<T> {
  })
  .collect::<Vec<_>>();
  - debug!("receiving shutdown signal ...");
  -
  + debug!("Waiting for the shutdown signal ...");
  // Recevied stop signal, doing cleanup
  let _ = receiver.recv();
  + debug!("Recevied the shutdown signal.");
  +
  for peer in network_state.peer_registry.read().peers().values() {
  info!("Disconnect peer {}", peer.connected_addr);
  if let Err(err) =
  