Git commits in Moodle 3.3.x by Marco Ferrante

commit d7360d798e918cede37150b87bd533bb10a2f658
Author: Marco Ferrante <marco@csita.unige.it>
Date:   Thu, 13 Jul 2017 16:08:52 +0800
Tag:    v3.3.2

MDL-59432 auth_db: add aliases to field mapping query