docs: public URLNormalizer unsecureScheme() {
          Matcher m = PATTERN_SCHEMA.matcher(url);
          if (m.find()) {
              String schema = m.group(1);
              if ("https".equalsIgnoreCase(schema)) {
                  url = m.replaceFirst(StringUtils.stripEnd(schema, "Ss") + "$2");
              }
          }
          return this;
      }