Git commits in Moodle 2.2.4 by Jonathan Harker

commit afb6a8aa242f0db1644ea69987c5b231e31a4507
Author: Jonathan Harker <jonathan@catalyst.net.nz>
Date:   Wed, 20 Jun 2012 11:45:47 +0800
Tag:    v2.2.4

MDL-27125 better manage file handles when downloading multiple files.