ansible-inventories/arocom#2824 Set variable HTTP_X_FORWARDED HOST only if no...

ansible-inventories/arocom#2824 Set variable HTTP_X_FORWARDED HOST only if no HaProxy and if no multidomain setup is being used

templates/vhost.conf

@@ -61,7 +61,9 @@
 {% if drupal_domain.bigpipe|default(false) %}
   SetEnv no-gzip 1
 {% endif %}
+{% if groups.proxyserver is not defined and not drupal_domain.multidomain|default(false) %}
   SetEnv HTTP_X_FORWARDED_HOST {{ drupal_domain.domain }}
+{% endif %}
   SetEnv HTTPS {{ (drupal_domain.protocol|default("https") == 'https')|ternary('on','off') }}
   SetEnvIf Authorization .+ HTTP_AUTHORIZATION=$0