Git commits in Moodle 2.8.10 by Jun Pataleta

commit 37ccc13b0f2ab6059ccc7f51519941f43ca95217
Author: Jun Pataleta <jun@moodle.com>
Date:   Tue, 20 Oct 2015 05:50:01 +0800
Tag:    v2.8.10

MDL-51837 user: Check if user email is set on validation