Git commits in Moodle 4.0.x by Vitaly

commit d7d1ed65a5736ab768f818f106eff1bd53ae9935
Author: Vitaly <potenkov@gmail.com>
Date:   Sat, 19 Sep 2020 02:45:26 +0800
Tag:    v4.0.0-beta

MDL-56653 enrol_meta: a single DB query in edit_instance_validation


commit 3a4af1eb4c92d659f5782f8600257034b2eb14e8
Author: Vitaly <potenkov@gmail.com>
Date:   Wed, 16 Sep 2020 02:46:47 +0800
Tag:    v4.0.0-beta

MDL-69342 core_user: fixed user picture updating


commit 6e7d77d11c6af035758a1c34249cdbcebe8dda31
Author: Vitaly Potenko <potenkov@gmail.com>
Date:   Mon, 17 Aug 2020 20:45:53 +0800
Tag:    v4.0.0-beta

MDL-69194 user: make core_user_update_users return warnings