Developer credits
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