Git commits in Moodle 3.2.8 by Adrian Greeve

commit db1fd7f53f723bc434ace723dea51c35e585a33b
Author: Adrian Greeve <adrian@moodle.com>
Date:   Sat, 20 Jan 2018 10:56:18 +0800
Tag:    v3.2.8

MDL-61242 repository_equella: Add source key when sending the source.