Git commits in Moodle 2.7.5 by Gilles-Philippe Leblanc

commit 13f6652060da6040440dc3d6e91acdd4c927e362
Author: Gilles-Philippe Leblanc <gilles-philippe.leblanc@umontreal.ca>
Date:   Fri, 16 Jan 2015 22:43:10 +0800
Tag:    v2.7.5

MDL-48873 auth_cas: Wrong redirection with bad multiauth login