Git commits in Moodle 3.8.6 by andreasschenkel

commit 130707d4e21c9bce1807f96fa3ed53cd6f986329
Author: andreasschenkel <31856043+andreasschenkel@users.noreply.github.com>
Date:   Mon, 12 Oct 2020 17:06:12 +0800
Tag:    v3.8.6

MDL-69844 user: Fix no email in download_participants_table