message: added link tag to html extraction
diff: @@ -223,6 +223,7 @@ impl<'a> Extractor<'a> {
  self.extract_links_by_attr(resp_url, links, html, "div", "src");
  self.extract_links_by_attr(resp_url, links, html, "frame", "src");
  self.extract_links_by_attr(resp_url, links, html, "embed", "src");
  + self.extract_links_by_attr(resp_url, links, html, "link", "href");
  }
  /// Given the body of a `reqwest::Response`, perform the following actions
  