val childIndex = (accumulator ushr (accumulatorBitCount - 8)) and 0xff
        node = node.children!![childIndex]!!
        if (node.children == null) {
          // Terminal node.
          sink.writeByte(node.symbol)
          accumulatorBitCount -= node.terminalBitCount
          node = root
        } else {
          // Non-terminal node.
          accumulatorBitCount -= 8
        }
      }
    }

    // with MD5 or 512-bit RSA; that's insecure!
    //
    // openssl req \
    //   -x509 \
    //   -md5 \
    //   -nodes \
    //   -days 1 \
    //   -newkey rsa:512 \
    //   -keyout privateKey.key \
    //   -out certificate.crt
    val certificatePem =
      """
      |-----BEGIN CERTIFICATE-----

cw.cloud nl.ca nl.ci nl.eu.org nl.no nm.cn nm.us no no-ip.biz no-ip.ca no-ip.co.uk no-ip.info no-ip.net no-ip.org no.com no.eu.org no.it nobeoka.miyazaki.jp noboribetsu.hokkaido.jp nobushi.jp noda.chiba.jp noda.iwate.jp nodes.k8s.fr-par.scw.cloud nodes.k8s.nl-ams.scw.cloud nodes.k8s.pl-waw.scw.cloud nog.community nogata.fukuoka.jp nogi.tochigi.jp noheji.aomori.jp noho.st nohost.me noip.me noip.us nokia nom.ad nom.ag nom.co nom.es nom.fr nom.km nom.mg nom.nc nom.ni nom.pa nom.pe nom.pl nom.re nom.ro...

k8s.fr-par.scw.cloud
nodes.k8s.fr-par.scw.cloud
s3.fr-par.scw.cloud
s3-website.fr-par.scw.cloud
whm.fr-par.scw.cloud
priv.instances.scw.cloud
pub.instances.scw.cloud
k8s.scw.cloud
k8s.nl-ams.scw.cloud
nodes.k8s.nl-ams.scw.cloud
s3.nl-ams.scw.cloud
s3-website.nl-ams.scw.cloud
whm.nl-ams.scw.cloud
k8s.pl-waw.scw.cloud
nodes.k8s.pl-waw.scw.cloud
s3.pl-waw.scw.cloud

import okhttp3.Cache;
import okhttp3.HttpUrl;
import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;

/**
 * Fetches HTML from a requested URL, follows the links, and repeats.
 */
public final class Crawler {
  private final OkHttpClient client;