Git merges in Moodle 2.8.11 by Eloy Lafuente (stronk7)

commit 488087cb693b8f9753e4a40f8547938087498e17
Author: Eloy Lafuente (stronk7) <stronk7@moodle.org>
Date:   Sat, 12 Mar 2016 07:37:50 +0800
Tag:    v2.8.11

Merge branch 'install_28_STABLE' of https://git.in.moodle.com/amosbot/moodle-install into MOODLE_28_STABLE