vhost: Add option to find and replace headers in reverse proxy

roles/vhost/vars/main.yaml

@@ -13,6 +13,7 @@ _vhost_matchers: >-
 _vhost_location_defaults:
   type: "{{ vhost_type }}"
   headers: "{{ vhost_headers }}"
+  find_replace_headers: "{{ vhost_find_replace_headers }}"
   delete_headers: "{{ vhost_delete_headers }}"
 
   basicauth: "{{ vhost_basicauth }}"