Git commits in Moodle 3.11.x by Hien Dinh

commit b21541294a99494c7061167408999e287a7c2530
Author: Hien Dinh <dpvhien.devÂgmail.com>
Date:   Tue, 20 Sep 2022 22:18:55 +0800
Tag:    v3.11.11

MDL-72490 availability: Show error if conflict in date restriction