Git commits in Moodle 2.8.10 by Dani Palou

commit 5d2e3c1b977670e8b2c86c59414217977e82d041
Author: Dani Palou <dani@moodle.com>
Date:   Tue, 27 Oct 2015 23:09:55 +0800
Tag:    v2.8.10

MDL-51935 wiki: Add missing strings in wiki