def set_header_options(curl)
      summary = summary_for_feed
      
      unless summary.nil?
        curl.headers['If-None-Match']     = summary[:etag] unless summary[:etag].nil?
        curl.headers['If-Modified-Since'] = summary[:last_modified] unless summary[:last_modified].nil?
      end
      
      curl
    end
def set_header_options(curl)
      summary = summary_for_feed
      
      unless summary.nil?
        curl.headers['If-None-Match']     = summary[:etag] unless summary[:etag].nil?
        curl.headers['If-Modified-Since'] = summary[:last_modified] unless summary[:last_modified].nil?
      end
      
      curl
    end
Sets the headers from the backend, if available