Git commits in Moodle 3.4.0 by Sebastian Tabares Amaya

commit 675b291d47f9eff3bc1aaa609b6849c42bb8d2f4
Author: Sebastian Tabares Amaya <sytabaresa@gmail.com>
Date:   Fri, 07 Jul 2017 22:12:11 +0800
Tag:    v3.4.0-beta

MDL-59473 request: Fix Loop Redirection in Oauth2