Git commits in Moodle 3.3.8 by sam marshall

commit 6892904225970a583a2fabec9e1aa5c83629435e
Author: sam marshall <s.marshall@open.ac.uk>
Date:   Thu, 21 Jun 2018 00:44:51 +0800
Tag:    v3.3.8

MDL-62799 tool_dataprivacy: Add capabilities to control data downloads