Git commits in Moodle 2.2.4 by Kevin Wiliarty

commit ca6141c264fcc2ce74748f75233a770c0f57cd37
Author: Kevin Wiliarty <kevin.wiliarty@gmail.com>
Date:   Wed, 20 Jun 2012 02:14:49 +0800
Tag:    v2.2.4

MDL-33749 follow redirects for URL downloader