Git commits in Moodle 2.1.7 by Henning Bostelmann

commit a2ec78a369b8c6fc4ac5f225d352fedf6f4e15e4
Author: Henning Bostelmann <henning.bostelmann@york.ac.uk>
Date:   Sun, 23 Oct 2011 06:43:11 +0800
Tag:    v2.1.7

MDL-28557 Calendar filters: show all group events in course to teacher