Force RSS URLs to http rather than https.

feed_content/viewsets.py

         order_by = ('name',)
 
     def render_rss_url(self, value, bound_column):
-        rss_url = bound_column._table.view.request.build_absolute_uri(reverse('rss:daily', kwargs={'feed_category_id': value}))
+        rss_url = bound_column._table.view.request.build_absolute_uri(reverse('rss:daily', kwargs={'feed_category_id': value})).replace('https://', 'http://')
         return mark_safe('<a href="{0}">{0}</a>'.format(rss_url))
 
 class FeedCategoryForm(forms.ModelForm):