docs: static String getSherdogPageUrl(Document doc) {
          String url = Optional.ofNullable(doc.head())
                  .map(h -> h.select("meta"))
                  .map(es -> es.stream().filter(e -> e.attr("property").equalsIgnoreCase("og:url")).findFirst().orElse(null))
                  .map(m -> m.attr("content"))
                  .orElse("");
  
          if(url.startsWith("//")){ //2018-10-10 bug in sherdog  where ig:url starts with //?
              url = url.replaceFirst("//","http://");
          }
  
          return url.replace("http://", "https://");
      }