Update docs for improvements in IdP initiated flow
Update docs for improvements in IdP initiated flow

simplesamlphp/simplesamlphp,simplesamlphp/simplesamlphp,dnmvisser/simplesamlphp,dnmvisser/simplesamlphp,dnmvisser/simplesamlphp,simplesamlphp/simplesamlphp,ghalse/simplesamlphp,ghalse/simplesamlphp,ghalse/simplesamlphp,ghalse/simplesamlphp,dnmvisser/simplesamlphp,simplesamlphp/simplesamlphp