add missing toctree entry for the firewall restriction article

xabbuh · xabbuh · commit 612ab9b3af17 · 2014-04-03T15:48:13.000+02:00
diff --git a/cookbook/security/index.rst b/cookbook/security/index.rst
@@ -12,6 +12,7 @@ Security
     acl
     acl_advanced
     force_https
+    firewall_restriction
     host_restriction
     form_login
     securing_services
