Git commits in Moodle 2.8.3 by Damyon Wiese

commit a72f2cca7f08c354c18a3923c3f05eee50bdd434
Author: Damyon Wiese <damyon@moodle.com>
Date:   Tue, 27 Jan 2015 23:16:10 +0800
Tag:    v2.8.3

MDL-48980 Security: Always clean the result from min_get_slash_argument