Git commits in Moodle 3.4.0 by Mathew May

commit 477ab6f808c2fb70ce0f0fecc7776b276715c792
Author: Mathew May <mathewm@hotmail.co.nz>
Date:   Fri, 08 Sep 2017 09:09:29 +0800
Tag:    v3.4.0-beta

MDL-53244 login: Add error message for recaptcha