Add posibility to add extra proxy config in config file.

global/overlay/etc/puppet/modules/soc/manifests/sso.pp

@@ -44,6 +44,7 @@ class soc::sso(
   String            $translog         = 'INFO',
   String            $proxy            = 'https://shared-sso-proxy1.cert.sunet.se/idp',
   String            $entityID         = $proxy,
+  Optional[String]  $extra_proxy_conf = undef,
 ) {
 
   if $ssotype == "docker" {

global/overlay/etc/puppet/modules/soc/templates/sso/apache-site.conf.erb

@@ -39,6 +39,10 @@
         ShibUseHeaders On
         <%- end -%>
 
+        <%- if @extra_proxy_conf -%>
+        IncludeOptional <%= @extra_proxy_conf %>
+        <%- endif -%>
+
         AuthGroupFile /etc/apache2/groups.txt
         Require group <% @groups.each.with_index do |group, i| %><%= group %><%= ' ' if i < (@groups.size - 1) %><% end %>
     </Location>