SAML2/LogoutRequest: Add support for multiple SessionIndex entries in the message.
SAML2/LogoutRequest: Add support for multiple SessionIndex entries in the message.

git-svn-id: a243b28a2a52d65555a829a95c8c333076d39ae1@2493 44740490-163a-0410-bde0-09ae8108e29a

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