Add the ability to use extra_config when base site is redirected

Change-Id: I8f289836521147fa02252a6c4cd05a9d953b11f7
diff --git a/templates/vhost.conf.j2 b/templates/vhost.conf.j2
index f5e7e8a..99a4ce2 100644
--- a/templates/vhost.conf.j2
+++ b/templates/vhost.conf.j2
@@ -24,6 +24,12 @@
   }
 
 {% if item.strip_request_uri is defined and item.strip_request_uri %}
+{% if item.extra_config is defined and item.extra_config %}
+  # extra config
+  {{ item.extra_config | indent(2) }}
+
+{% endif %}
+
 {% set uri = "" %}
 {% else %}
 {% set uri = "$request_uri" %}