Git commits in Moodle 3.3.1 by David Monllao

commit df6749b03bc386e9ea92bb4b9b3a40160bf83871
Author: David Monllao <davidm@moodle.com>
Date:   Fri, 19 May 2017 13:08:39 +0800
Tag:    v3.3.1

weekly release 3.3+