Git commits in Moodle 3.9.4 by Eric Merrill

commit 1925b641e250004a70569f56c2efe9bab982f191
Author: Eric Merrill <merrill@oakland.edu>
Date:   Fri, 04 Dec 2020 23:43:46 +0800
Tag:    v3.9.4

MDL-70409 chat: Use require_once to import lib.php