https://github.com/onelogin/php-saml/pull/44
https://github.com/steffengy/php-saml/commit/ce3bf78afb9ffa5733c2263a5c1831413d7dd521
https://github.com/steffengy/php-saml/commit/9c4781a897a4e9128dc4e13803c204842873b1d1
https://github.com/steffengy/php-saml/commit/199be191fc6a40312ef806876ed28885f093d4d3