Git commits in Moodle 3.6.x by fabmen

commit c637d96786de875d80e187f9051c352af1931870
Author: fabmen <menard.fabrice@gmail.com>
Date:   Mon, 27 Nov 2017 20:54:53 +0800
Tag:    v3.6.0-beta

MDL-60435 auth_shibboleth: Display IDPs for Authentication Shibboleth.