message: Refactor pcntl to Swoole\Process.
diff: @@ -15,10 +15,10 @@ $client->connect(UDP_SERVER_HOST, UDP_SERVER_PORT);
  $data = "UdpSendto";
  $client->send($data);
  -
  +usleep(100 * 1000);
  $message = $client->recv();
  echo "FromServer:$message\n";
  -echo "SUCCESS";
  +echo "SUCCESS\n";
  ?>
  --EXPECTF--
  