Git commits in Moodle 2.7.2 by Paul Holden

commit 1b1432ab88b32910a2ac2fe9e1a30df0a66b57e5
Author: Paul Holden <pholden@greenhead.ac.uk>
Date:   Fri, 06 Jan 2012 19:52:31 +0800
Tag:    v2.7.2

MDL-21042 report_security: don't display warning for riskbackup unnecessarily