Git commits in Moodle 3.7.0 by Paul Holden

commit 114973b5498ad782a6ed09ef7d70d8d5dadc7761
Author: Paul Holden <pholden@greenhead.ac.uk>
Date:   Wed, 27 Mar 2019 22:02:18 +0800
Tag:    v3.7.0-beta

MDL-59326 admin: use passwordunmask element for shared secrets.

commit 38cb434ba65b52ac0c6c955d4d73e0d0dd413a44
Author: Paul Holden <pholden@greenhead.ac.uk>
Date:   Wed, 27 Mar 2019 20:01:42 +0800
Tag:    v3.7.0-beta

MDL-65197 editor: handle empty user preference in privacy export.

commit 47e466c9589db1069286634b6ae9280e7d8d6fdc
Author: Paul Holden <pholden@greenhead.ac.uk>
Date:   Fri, 08 Mar 2019 22:40:41 +0800
Tag:    v3.7.0-beta

MDL-46931 roles: retrieve distinct users in sub-query.

commit 9ded266b4eb98c3615c64f739e0d726abd7a66d9
Author: Paul Holden <pholden@greenhead.ac.uk>
Date:   Fri, 08 Mar 2019 20:32:24 +0800
Tag:    v3.7.0-beta

MDL-43130 access: fix user counting when retrieving assignable roles.

commit 1cd62f2bc804faa7e5394162cdd98b9a308e6e93
Author: Paul Holden <pholden@greenhead.ac.uk>
Date:   Thu, 13 Dec 2018 17:27:53 +0800
Tag:    v3.7.0-beta

MDL-64190 mod_quiz: use password unmask config element.

commit 1a36b8b5aa630dec46790517e2eb0052ad080c3f
Author: Paul Holden <pholden@greenhead.ac.uk>
Date:   Fri, 23 Nov 2018 19:20:37 +0800
Tag:    v3.7.0-beta

MDL-64190 search_solr: use password unmask config elements.