sp/SingleLogoutService: Switch to SAML2 library.
sp/SingleLogoutService: Switch to SAML2 library.

git-svn-id: a243b28a2a52d65555a829a95c8c333076d39ae1@1615 44740490-163a-0410-bde0-09ae8108e29a

jschlyter/simplesamlphp,dzuelke/simplesamlphp,shoaibali/simplesamlphp,sitya/simplesamlphp,simplesamlphp/simplesamlphp,ghalse/simplesamlphp,dnmvisser/simplesamlphp,Kunstmaan/simplesamlphp,maytechnet/simplesamlphp,cwaldbieser/simplesamlphp,StudentLifeMarketingAndDesign/simplesamlphp,cwaldbieser/simplesamlphp,sylvainmed/simplesamlphp,sylvainmed/simplesamlphp,jschlyter/simplesamlphp,dzuelke/simplesamlphp,BrettMerrick/simplesamlphp,sitya/simplesamlphp,dialogik/simplesamlphp,grnet/simplesamlphp,dnmvisser/simplesamlphp,girgen/simplesamlphp,Kunstmaan/simplesamlphp,maytechnet/simplesamlphp,shoaibali/simplesamlphp,simplesamlphp/simplesamlphp,madmatt/simplesamlphp,girgen/simplesamlphp,BrettMerrick/simplesamlphp,dialogik/simplesamlphp,gtkrug/simplesamlphp,dialogik/simplesamlphp,Kunstmaan/simplesamlphp,cwaldbieser/simplesamlphp,jschlyter/simplesamlphp,girgen/simplesamlphp,grnet/simplesamlphp,girgen/simplesamlphp,BrettMerrick/simplesamlphp,sitya/simplesamlphp,simplesamlphp/simplesamlphp,cwaldbieser/simplesamlphp,ghalse/simplesamlphp,shoaibali/simplesamlphp,dnmvisser/simplesamlphp,StudentLifeMarketingAndDesign/simplesamlphp,maytechnet/simplesamlphp,madmatt/simplesamlphp,sitya/simplesamlphp,gtkrug/simplesamlphp,sylvainmed/simplesamlphp,gtkrug/simplesamlphp,dzuelke/simplesamlphp,BrettMerrick/simplesamlphp,madmatt/simplesamlphp,simplesamlphp/simplesamlphp,StudentLifeMarketingAndDesign/simplesamlphp,jschlyter/simplesamlphp,dzuelke/simplesamlphp,sylvainmed/simplesamlphp,dialogik/simplesamlphp,dnmvisser/simplesamlphp,ghalse/simplesamlphp,ghalse/simplesamlphp,jschlyter/simplesamlphp,Kunstmaan/simplesamlphp,madmatt/simplesamlphp,shoaibali/simplesamlphp,grnet/simplesamlphp,grnet/simplesamlphp,dialogik/simplesamlphp,StudentLifeMarketingAndDesign/simplesamlphp,girgen/simplesamlphp,gtkrug/simplesamlphp,maytechnet/simplesamlphp