saml2/idp: Fix backwards-compatibility with old authentication files.
saml2/idp: Fix backwards-compatibility with old authentication files.

git-svn-id: a243b28a2a52d65555a829a95c8c333076d39ae1@2022 44740490-163a-0410-bde0-09ae8108e29a

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