Git commits in Moodle 3.6.7 by Tobias Reischmann

commit 8fd70353e68a09272f17e4a7e7177610fea0c868
Author: Tobias Reischmann <tobias.reischmann@wi.uni-muenster.de>
Date:   Wed, 28 Aug 2019 21:12:40 +0800
Tag:    v3.6.7

MDL-66543 forms: Make (hard) frozen textareas readonly (or disabled)