Git commits in Moodle 3.11.1 by sam marshall

commit d7434abe976e9400d020b75009c657f51a825b54
Author: sam marshall <s.marshall@open.ac.uk>
Date:   Wed, 02 Jun 2021 21:51:38 +0800
Tag:    v3.11.1

MDL-71836 core_enrol: Cannot search for users by username

commit b0be8281b6aa256dda927c2962f901d370892ea3
Author: sam marshall <s.marshall@open.ac.uk>
Date:   Wed, 02 Jun 2021 19:03:35 +0800
Tag:    v3.11.1

MDL-71832 core_admin: Browse users page, sort by custom field fails

commit 52636524d4f7fc652f34e7cea437940fa5bf448c
Author: sam marshall <s.marshall@open.ac.uk>
Date:   Wed, 12 May 2021 17:58:43 +0800
Tag:    v3.11.1

MDL-71559 core_user: Fields support for PROFILE_VISIBLE_TEACHERS