Git merges in Moodle 2.7.17 by Eloy Lafuente (stronk7)

commit 9ebc70478cd637732ff9507f7932863a721c87f9
Author: Eloy Lafuente (stronk7) <stronk7@moodle.org>
Date:   Sun, 13 Nov 2016 03:21:11 +0800
Tag:    v2.7.17

Merge branch 'install_27_STABLE' of https://git.in.moodle.com/amosbot/moodle-install into MOODLE_27_STABLE