Theme: Fixed disqus for https

See https://help.disqus.com/customer/portal/articles/542119-can-disqus-be-loaded-via-https-

Author: ozkriff

theme/templates/disqus.html

@@ -6,7 +6,7 @@
     /* * * DON'T EDIT BELOW THIS LINE * * */
     (function() {
         var dsq = document.createElement('script'); dsq.type = 'text/javascript'; dsq.async = true;
-        dsq.src = 'http://' + disqus_shortname + '.disqus.com/embed.js';
+        dsq.src = '//' + disqus_shortname + '.disqus.com/embed.js';
         (document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(dsq);
         })();
     </script>