Update upgrade notes.
Update upgrade notes.

madmatt/simplesamlphp,grnet/simplesamlphp,simplesamlphp/simplesamlphp,gtkrug/simplesamlphp,dnmvisser/simplesamlphp,shoaibali/simplesamlphp,simplesamlphp/simplesamlphp,simplesamlphp/simplesamlphp,dnmvisser/simplesamlphp,simplesamlphp/simplesamlphp,jschlyter/simplesamlphp,maytechnet/simplesamlphp,grnet/simplesamlphp,gtkrug/simplesamlphp,BrettMerrick/simplesamlphp,madmatt/simplesamlphp,dnmvisser/simplesamlphp,BrettMerrick/simplesamlphp,BrettMerrick/simplesamlphp,jschlyter/simplesamlphp,maytechnet/simplesamlphp,sitya/simplesamlphp,ghalse/simplesamlphp,ghalse/simplesamlphp,grnet/simplesamlphp,jschlyter/simplesamlphp,maytechnet/simplesamlphp,shoaibali/simplesamlphp,sitya/simplesamlphp,gtkrug/simplesamlphp,shoaibali/simplesamlphp,dnmvisser/simplesamlphp,grnet/simplesamlphp,gtkrug/simplesamlphp,jschlyter/simplesamlphp,ghalse/simplesamlphp,madmatt/simplesamlphp,sitya/simplesamlphp,jschlyter/simplesamlphp,BrettMerrick/simplesamlphp,shoaibali/simplesamlphp,maytechnet/simplesamlphp,madmatt/simplesamlphp,ghalse/simplesamlphp,sitya/simplesamlphp