Git commits in Moodle 3.1.x by SSRF

commit e716d6e8f738b3158f7282f2ab6f3fb2ef3a7ec4
Author: SSRF <SSRF@users.noreply.github.com>
Date:   Thu, 06 Oct 2016 00:14:09 +0800
Tag:    v3.1.4

MDL-53677 tool_spamcleaner: CSRF Fix