cookbook merges these sources. Each keeps its own license; the merged
list is published under the terms below for each part.

CERT Polska warning list
  https://cert.pl/en/warning-list/
  License: Free for any use, including commercial (https://cert.pl/en/warning-list/)

Spamhaus DROP
  https://www.spamhaus.org/blocklists/do-not-route-or-peer/
  License: Free with credit to Spamhaus; keep the date and (c) notice (https://www.spamhaus.org/blocklists/do-not-route-or-peer/)

The Block List Project: phishing
  https://github.com/blocklistproject/Lists
  License: Unlicense (https://github.com/blocklistproject/Lists/blob/master/LICENSE)

The Block List Project: ransomware
  https://github.com/blocklistproject/Lists
  License: Unlicense (https://github.com/blocklistproject/Lists/blob/master/LICENSE)

The Block List Project: scam
  https://github.com/blocklistproject/Lists
  License: Unlicense (https://github.com/blocklistproject/Lists/blob/master/LICENSE)

Popular domains removed from the list come from:
Tranco top sites (used only to remove popular domains; not republished)
  https://tranco-list.eu/
  License: See the Tranco site; cite Le Pochat et al., NDSS 2019 (https://tranco-list.eu/)