Git commits in Moodle 2.7.17 by Dan Poltawski

commit bf44038b226617b564d2978784582e9e6633f96d
Author: Dan Poltawski <dan@moodle.com>
Date:   Thu, 15 Sep 2016 18:15:14 +0800
Tag:    v2.7.17

weekly release 2.7.16+