#4692 - Use $proxy_add_x_forwarded_for to log mimeo client IPs

hiera/roles/web/adblockbrowser.yaml

 classes:
   adblockplus::web::mimeo:
     format: $remote_addr - - [$time_local] "$request" $status $bytes_sent "$http_referer" "$http_user_agent" "$http_x_forwarded_for" - "$http_accept_language" "$http_host" "$http_x_client_id" $http_content_length "$http_content_type" $request_body
     response: All good, carry on!
     port: 8000
   web::server:
     vhost: adblockbrowser.org
     aliases:
       - www.adblockbrowser.org
     is_default: true
     custom_config: |
       location /submit-feedback {
         proxy_pass http://127.0.0.1:8000;
         proxy_set_header User-Agent $http_user_agent;
         proxy_set_header Referer $http_referer;
-        proxy_set_header X-Forwarded-For $http_x_forwarded_for;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
         proxy_set_header Accept-Language $http_accept_language;
         proxy_set_header Host $http_host;
         proxy_set_header X-Client-Id $http_x_client_id;
       }
       location /badadssuck {
         rewrite ^(.*) https://eyeo.to/$1 redirect;
       }
     repository: web.adblockbrowser.org
     multiplexer_locations:
       - /sendInstallationLink
@@ skipping 17 matching lines @@
 sitescripts::configfragments:
   installation_link:
     content: |
       [DEFAULT]
       mailer=/usr/sbin/sendmail
       [multiplexer]
       sitescripts.send_installation_link.web.send_installation_link =
       [send_installation_link]
       email_template=send_installation_link/template/adblockbrowser_installation_link.tmpl