Git commits in Moodle 3.8.x by Iñigo Zendegi

commit f0d380703abfc5758c72160f489be0035844161f
Author: Iñigo Zendegi <izendegi@mondragon.edu>
Date:   Tue, 03 Sep 2019 20:46:15 +0800
Tag:    v3.8.1

MDL-66581 auth: Do string concatenation for the password change URL