On Kamailio 5.3.0 (`ad1905`) on CentOS 7, with `libcurl` 7.29.0-46, an `http_connect()` request to an unresponsive server...

``` http_connect("stuff", "/url, "$var(http_res)"); ```

.. correctly sets `$var(http_res)` to `28`, which is an operation timeout per https://curl.haxx.se/libcurl/c/libcurl-errors.html.

However, `$curlerror($var(http_res))` returns the value `"No error"`. This is not quite as promised in https://kamailio.org/docs/modules/5.3.x/modules/http_client.html#idm480.

Thanks in advance!

-- Alex