Don't forget to config TRR TODO ---- * test cases * change pref to network.security.esni.enabled * test cname cases from todo tlswg/draft-ietf-tls-esni#35 * why are we canceling A lookup when TXT fails? nsSocketTransport::OnLookupByTypeComplete() * OTHER FEATURES FROM ORIGINAL DOC? RECOVERY? * https://docs.google.com/document/d/1JL_kFW2W2Z4zJKP5JjTwHsRvT1svoC0xEaZQGCDJtAM/edit