Git commits in Moodle 3.6.3 by Amaia Anabitarte

commit ec32dbcd8c82b7bdd139bf2362cb4ee1cb7737a5
Author: Amaia Anabitarte <amaia@moodle.com>
Date:   Thu, 24 Jan 2019 00:36:23 +0800
Tag:    v3.6.3

MDL-64663 core_message: Behat to test admin settings

commit 2fcf9253b73a9de6866014032433931ea2465e4a
Author: Amaia Anabitarte <amaia@moodle.com>
Date:   Wed, 19 Dec 2018 22:23:05 +0800
Tag:    v3.6.3

MDL-64385 user: Case insensitive comparison for email domains