Adding Listen in redirect site

The patch adds listen_address to redirect site definiton.
In case `listen_default_ports` is defined False and
listen_address is defined for redirection apache state adds
Listen directive to redirection site config.

Change-Id: Ie8dba33cdaf0fd41cbbb3c8a338fbc766cef005e
Related-PROD: PROD-24978
Related-PROD: PROD-24977
diff --git a/README.rst b/README.rst
index 6590959..706bf0b 100644
--- a/README.rst
+++ b/README.rst
@@ -173,6 +173,26 @@
             limits:
               request_body: 114688
 
+Apache redirect site definition.
+
+.. code-block:: yaml
+
+    apache:
+      server:
+        site:
+          openstack_web_redirect:
+            name: 'openstack_web_redirect'
+            enabled: true
+            type: 'redirect'
+            root: '/var/www/httproot'
+            host:
+              address: ${_param:apache_horizon_api_address}
+              name: ${_param:apache_horizon_api_host}
+              port: 80
+            redirect_mode: rewrite
+            target_url: 'https://%{SERVER_NAME}'
+            listen_address: '0.0.0.0'
+
 Apache ssl cipher management
 
 .. code-block:: yaml