[master] 794e231 Add reference to ACLs

[Per Buer]

commit 794e23178ac91d065f75f14ad17bb1492ce2b73c
Author: Per Buer <perbu at varnish-software.com>
Date:   Thu Feb 20 19:40:15 2014 +0100

    Add reference to ACLs

diff --git a/doc/sphinx/users-guide/run_security.rst b/doc/sphinx/users-guide/run_security.rst
index 16ab277..dfcfc6d 100644
--- a/doc/sphinx/users-guide/run_security.rst
+++ b/doc/sphinx/users-guide/run_security.rst
@@ -223,6 +223,5 @@ to various kinds of attacks and subversive activities.
 
 If you have "administrative" HTTP requests, for instance PURGE
 requests, we strongly recommend that you restrict them to trusted
-IP numbers/nets using VCL's Access Control Lists.
+IP numbers/nets using VCL's :ref:`vcl_syntax_acl`.
 
-.. (XXX: missing ref to ACL)