fixed security example configuration for the /_internal prefix

Author: fabpot

app/config/security.yml

@@ -35,4 +35,8 @@ security:
 
     access_control:
         #- { path: ^/login, roles: IS_AUTHENTICATED_ANONYMOUSLY, requires_channel: https }
+        #
+        # You must uncomment the two following rules to restrict access to paths
+        # starting with the /_internal prefix to only localhost
         #- { path: ^/_internal, roles: IS_AUTHENTICATED_ANONYMOUSLY, ip: 127.0.0.1 }
+        #- { path: ^/_internal, roles: ROLE_NO_ACCESS }