message: add hook_flags option for Server
diff: @@ -2163,6 +2163,10 @@ static PHP_METHOD(swoole_server, set)
  max_num = zval_get_long(v);
  PHPCoroutine::set_max_num(max_num <= 0 ? SW_DEFAULT_MAX_CORO_NUM : max_num);
  }
  + if (php_swoole_array_get_value(vht, "hook_flags", v))
  + {
  + PHPCoroutine::config.hook_flags = zval_get_long(v);
  + }
  if (php_swoole_array_get_value(vht, "send_yield", v))
  {
  serv->send_yield = zval_is_true(v);
  