Register::getINA

static function getINA(?string $tld = null): string
{
	$http = new HttpClient;
	$zone = ($tld == 'kz') ? 'kz' : Manager::getZone();
	$ip = $http->get(self::B24_SERVICE_DETECT_IP . $zone);
	$ip = CUtil::jsObjectToPhp($ip);

	return isset($ip['IP']) ? $ip['IP'] : self::B24_DEFAULT_DNS_IP;
}