Git commits in Moodle 3.4.1 by Tim Hunt

commit b6e79ab8d8c7f646343f89a1bccb89775005667a
Author: Tim Hunt <T.J.Hunt@open.ac.uk>
Date:   Fri, 22 Dec 2017 21:35:29 +0800
Tag:    v3.4.1

MDL-61107 quiz editing: handle invalid Maximum grade input

commit 3093cc28f1dbb2433f233fc1be24b1a1cf21a31e
Author: Tim Hunt <T.J.Hunt@open.ac.uk>
Date:   Fri, 15 Dec 2017 21:11:57 +0800
Tag:    v3.4.1

MDL-61045 quiz settings: add back missing disabledIf

commit 5617f265680a8fa52bd2f0fbef83e841b3c62617
Author: Tim Hunt <T.J.Hunt@open.ac.uk>
Date:   Thu, 07 Dec 2017 03:40:38 +0800
Tag:    v3.4.1

MDL-60983 get_user_capability_course: fix buggy edge cases

commit d00007bc4590c86c35e147125599a5e9171de913
Author: Tim Hunt <T.J.Hunt@open.ac.uk>
Date:   Wed, 08 Nov 2017 22:30:27 +0800
Tag:    v3.4.1

MDL-60741 purgecaches: did not correctly setup the admin page