Git commits in Moodle 3.3.3 by Ankit Agarwal

commit 00479a197e6056aaf6481d9bf2b378223bc9e17b
Author: Ankit Agarwal <ankit@moodle.com>
Date:   Tue, 19 Sep 2017 13:57:24 +0800
Tag:    v3.3.3

MDL-59780 mathjax: Make sure mathjax url doesn't become empty

commit f8da314e596092c6bf8bd4f88737e031b6b39556
Author: Ankit Agarwal <ankit@moodle.com>
Date:   Tue, 05 Sep 2017 14:37:49 +0800
Tag:    v3.3.3

MDL-35849 login: Add role alert to error messages