Fix TLS cert updates for kosmos.chat

Some recipes weren't updated for the proxy validation yet. Needed to
split the ejabberd cert in two, so it can do normal validation on
`.org` and proxy validation on `.chat`.

site-cookbooks/kosmos-ejabberd/templates/vhost.yml.erb

@@ -1,7 +1,8 @@
 # Generated by Chef for <%= @host[:name] %>
 certfiles:
-  - "/opt/ejabberd/conf/<%= @host[:name] %>.crt"
-  - "/opt/ejabberd/conf/<%= @host[:name] %>.key"
+<% @host[:certfiles].each do |certfile| %>
+  - <%= certfile %>
+<% end %>
 host_config:
   "<%= @host[:name] %>":
     sql_type: pgsql