$ 0 0 This PR prevents sending .onion domains to Let's Encrypt.Filtering those reserved12 domains is required when Hiawatha is used to serve onion hidden services34 behind Tor.https://www.iana.org/assignments/special-use-domain-names/special-use-domain-names.xhtml#special-use-domain↩https://www.rfc-editor.org/rfc/rfc7686.html↩https://support.torproject.org/glossary/hidden-services/↩https://support.torproject.org/onionservices/onionservices-2/↩