Git merges in Moodle 3.4.9 by Eloy Lafuente (stronk7)

commit 3020929da81f8df4766a2962efce4f09f27beabb
Author: Eloy Lafuente (stronk7) <stronk7@moodle.org>
Date:   Sat, 11 May 2019 02:31:07 +0800
Tag:    v3.4.9

Merge branch 'install_34_STABLE' of https://git.in.moodle.com/amosbot/moodle-install into MOODLE_34_STABLE