message: Change disconnect close_code range
  From 1000 &
  to 1000 & 3000-3999(for framework) & 4000 - 4999(for developer)
diff: @@ -561,7 +561,7 @@ static PHP_METHOD(swoole_websocket_server, disconnect)
  RETURN_FALSE;
  }
  - if ((code < 4000 && code != 1000) || code >= 5000)
  + if ((code < 3000 && code != 1000) || code >= 5000)
  {
  swoole_php_fatal_error(E_WARNING, "Status code [%ld] is invalid.", code);
  RETURN_FALSE;
  