Added 'no-store' to the cache-control header to prevent Google Chrome from...

Added 'no-store' to the cache-control header to prevent Google Chrome from serving the 302 redirect from disk cache

lib/SimpleSAML/Utils/HTTP.php

@@ -176,7 +176,7 @@ class HTTP
 
             // disable caching of this response
             header('Pragma: no-cache');
-            header('Cache-Control: no-cache, must-revalidate');
+            header('Cache-Control: no-cache, no-store, must-revalidate');
         }
 
         // show a minimal web page with a clickable link to the URL