Add support for not passing host header to proxy upstream

roles/vhost/vars/main.yaml

@@ -15,6 +15,7 @@ _vhost_location_defaults:
   proxy_target_socket: "{{ vhost_proxy_target_socket if
     vhost_type == 'reverse_proxy' and vhost_proxy_target_netproto == 'unix' else '' }}"
   proxy_delete_headers: "{{ vhost_proxy_delete_headers }}"
+  proxy_pass_host_header: "{{ vhost_proxy_pass_host_header }}"
 
   redirect_target: "{{ vhost_redirect_target if vhost_type == 'redirect' else '' }}"
   redirect_preserve_path: "{{ vhost_redirect_preserve_path }}"