Fix to make issuer entity ID validation work when the remote IdP is a proxy and we are using IDPList option.
Fix to make issuer entity ID validation work when the remote IdP is a proxy and we are using IDPList option.

git-svn-id: a243b28a2a52d65555a829a95c8c333076d39ae1@3264 44740490-163a-0410-bde0-09ae8108e29a

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