Implementation samlp:LogoutRequestType as defined by
https://www.oasis-open.org/committees/download.php/35711/sstc-saml-core-errata-2.0-wd-06-diff.pdf
Page 62, Line 2686
Implementation samlp:LogoutResponse as defined by
https://www.oasis-open.org/committees/download.php/35711/sstc-saml-core-errata-2.0-wd-06-diff.pdf
Page 62, Line 2708