Developer credits
Git commits in Moodle 3.1.6 by Martin Gauk
commit 9de798de718786ba40428682e36632346d38bb34 Author: Martin Gauk <gauk@math.tu-berlin.de> Date: Mon, 13 Mar 2017 20:49:14 +0800 Tag: v3.1.6 MDL-58244 shibboleth: handle users who are logged out