+ * Connect to a micropub server to get an access token.
+ *
+ * @author Christian Weiske <cweiske@cweiske.de>
+ * @license http://www.gnu.org/licenses/agpl.html GNU AGPL v3
+ * @link http://cweiske.de/shpub.htm
+ * @link http://micropub.net/draft/
+ * @link http://indieweb.org/authorization-endpoint