message: SessionManager::onListenFailed alert logging (private)
diff: @@ -1068,6 +1068,15 @@ public class SessionManager {
  }
  }
  + private void onListenFailed(ListenFailedAlert alert) {
  + LOG.error("onListenFailed(): iface= " + alert.listenInterface() +
  + ", address= " + alert.address() +
  + ", port= " + alert.port() +
  + ", socketType= " + alert.socketType() +
  + ", errorCode= " + alert.error());
  + LOG.error("onListenFailed(): error_message=" + alert.message());
  + }
  +
  private void toggleDht(boolean on) {
  if (session == null || isDhtRunning() == on) {
  return;
  @@ -1169,6 +1178,10 @@ public class SessionManager {
  alert = Alerts.cast(a);
  onListenSucceeded((ListenSucceededAlert) alert);
  break;
  + case LISTEN_FAILED:
  + alert = Alerts.cast(a);
  + onListenFailed((ListenFailedAlert) alert);
  + break;
  case EXTERNAL_IP:
  alert = Alerts.cast(a);
  onExternalIpAlert((ExternalIpAlert) alert);
  