FEATURE: serialize the fact we are https in about

app/models/about.rb

@@ -8,6 +8,10 @@ class About
     Discourse::VERSION::STRING
   end
 
+  def https
+    SiteSetting.use_https
+  end
+
   def title
     SiteSetting.title
   end

app/serializers/about_serializer.rb

@@ -6,5 +6,6 @@ class AboutSerializer < ApplicationSerializer
              :description,
              :title,
              :locale,
-             :version
+             :version,
+             :https
 end