Author: Charles Fulton
MDL-35130 shibboleth: remove hard-coded string
http://git.moodle.org/gw?p=moodle.git;a=commit;h=63f329cad5121380f0d38863219b2e990044f6dc
http://github.com/moodle/moodle/commit/63f329cad5121380f0d38863219b2e990044f6dc
+ 2.5 en [auth_shib_contact_administrator,auth_shibboleth]