Git commits in Moodle 3.5.1 by Leon Stringer

commit 6d7093e3704fb3aab3cf945e7d38771c26651538
Author: Leon Stringer <leon@priorsvle.com>
Date:   Wed, 23 May 2018 02:45:04 +0800
Tag:    v3.5.1

MDL-62316 OAuth 2: Only guess image if base URL set.

commit a634c88ced3af5d9611e011e1299f5826fd1c5d2
Author: Leon Stringer <leon@priorsvle.com>
Date:   Fri, 13 Apr 2018 00:59:41 +0800
Tag:    v3.5.1

MDL-61786 auth: Changed strings for Test Settings to lang strings