Git commits in Moodle 3.2.x by Marco Ferrante

commit 4e184445f2e83f767d7aafbcedc96e61d04af8a2
Author: Marco Ferrante <marco@csita.unige.it>
Date:   Thu, 13 Jul 2017 16:08:52 +0800
Tag:    v3.2.5

MDL-59432 auth_db: add aliases to field mapping query