Git commits in Moodle 3.2.x by Martin Gauk

commit 8336d2be915d8378ff86cbded8b325088b53371e
Author: Martin Gauk <gauk@math.tu-berlin.de>
Date:   Mon, 13 Mar 2017 20:49:14 +0800
Tag:    v3.2.3

MDL-58244 shibboleth: handle users who are logged out