Prevent other sites from loading the login page in an iframe.
Prevent other sites from loading the login page in an iframe.

This patch adds the X-Frame-Options header to prevent simpleSAMLphp
pages from being used in iframes on third-party sited.

Thanks to Thijs Kinkhorst for adding this!

git-svn-id: a243b28a2a52d65555a829a95c8c333076d39ae1@3004 44740490-163a-0410-bde0-09ae8108e29a

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