Git commits in Moodle 2.3.9 by Frederic Massart

commit c5cb333a383b670852dad7ab7d334438d10e2d43
Author: Frederic Massart <fred@moodle.com>
Date:   Fri, 19 Jul 2013 16:02:56 +0800
Tag:    v2.3.9

MDL-40615 Repository: Updated Amazon S3 library