Merge branch '6.4' into 7.1

* 6.4:
  [Security] Remove note about stateless firewalls marking routes as stateless

Author: javiereguiluz

reference/configuration/security.rst

@@ -1063,9 +1063,6 @@ the session must not be used when authenticating users:
             // ...
         };
 
-Routes under this firewall will be :ref:`configured stateless <stateless-routing>`
-when they are not explicitly configured stateless or not.
-
 User Checkers
 ~~~~~~~~~~~~~