code: @Override
    public String sortIpAddressList(String ipAddressList) {
      if (ipAddressList == null || ipAddressList.trim().length() == 0) {
        return "";
      }
      String[] ipAddressToken = ipAddressList.split(";");
      List<InetAddress> parsedAddresses = new ArrayList<InetAddress>();
      for (String ip : ipAddressToken) {
        try {
          parsedAddresses.add(InetAddress.getByName(ip));
        } catch (UnknownHostException e) {
          log.log(Level.FINE, "Ip address not resolveable {0}.", ip);
        }
      }
      Collections.sort(parsedAddresses, null);
      return ipAddressList;
    }
docs: ***********************************************************************
  sortIpAddressList
  
  @see com.btr.proxy.selector.pac.ScriptMethods#sortIpAddressList(java.lang.String)
  **********************************************************************