message: fix valgrind warning trigger by http proxy sizeof
diff: @@ -657,7 +657,7 @@ void php_swoole_client_check_setting(swClient *cli, zval *zset TSRMLS_DC)
  if (php_swoole_array_get_value(vht, "http_proxy_port", v))
  {
  convert_to_long(v);
  - cli->http_proxy = ecalloc(1,sizeof(cli->http_proxy));
  + cli->http_proxy = ecalloc(1,sizeof(struct _http_proxy));
  cli->http_proxy->proxy_host = strdup(host);
  cli->http_proxy->proxy_port = Z_LVAL_P(v);
  }
  