Git commits in Moodle 3.11.x by Vitaly

commit 88d12b5dff8019dd6112fcb3204a87062f82fd62
Author: Vitaly <potenkov@gmail.com>
Date:   Sat, 19 Sep 2020 02:45:26 +0800
Tag:    v3.11.0-beta

MDL-56653 enrol_meta: a single DB query in edit_instance_validation