Git commits in Moodle 2.3.1 by Kevin Wiliarty

commit e3f4094ac826f3f3016b22b95ba84daee20dbc91
Author: Kevin Wiliarty <kevin.wiliarty@gmail.com>
Date:   Wed, 20 Jun 2012 02:14:49 +0800
Tag:    v2.3.1

MDL-33749 follow redirects for URL downloader