Missing IPv6 support

workaround in ip_ranges.module:

/**
 * Handles denied users.
 *
 * Prints a message and exits if access is denied.
 */
function ip_ranges_deny_access() {
  if(filter_var($_SERVER['REMOTE_ADDR'], FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {
        // we have an IPv6 visitor
  }
  else{
        // module can handle IPv4 only
        header($_SERVER['SERVER_PROTOCOL'] . ' 403 Forbidden');
        print 'Sorry, visits from ' . check_plain(ip_address()) . ' have been banned .';
        exit();
  } // end if IPv6
}