Git commits in Moodle 3.5.6 by Mark Nelson

commit cfa3409712bacf802bf8f96339c462aa62f8a32a
Author: Mark Nelson <markn@moodle.com>
Date:   Mon, 25 Mar 2019 17:12:53 +0800
Tag:    v3.5.6

MDL-65173 message_email: removed bogus logic