xmlseclibs: Remove SAML20 and Shib13 specific appendSignature, and replace with original.
xmlseclibs: Remove SAML20 and Shib13 specific appendSignature, and replace with original.


rchavik/simplesamlphp,rchavik/simplesamlphp,rchavik/simplesamlphp,rchavik/simplesamlphp