Add special case for GitLab URLs

The social links are implemented by the URL field module, which sets the link title in url_fetch_title().

function url_fetch_title($url) {
  $request = drupal_http_request($url);
  if (empty($request->error) && $request->code == 200 && !empty($request->data)) {
    if (preg_match('!<title>(.*?)</title>!iu', $request->data, $matches)) {
      // Title tags should be encoded, but we want the raw value.
      return decode_entities($matches[1]);
    }
  }
}

Gitlab sets a title, but for some reasons, it seems ignored.

I added the link to my Gitlab profile on my Drupal.org account, and it doesn't work, even if the link uses the https:// URL.