Lexicon v3.17.0

Added

• New method to determine the actual zone name for a given FQDN. Historically it was an extraction
  of the second-level domain given well-known TLDs (eg., domain.net for www.domain.net) using
  tldextract, and usage of --delegated option to enforce a specific zone name that is useful for
  third-level domains hosted on a specific zone (eg., sub-zone sub.domain.net delegated from zone
  domain.net).
  It is now possible to use the --resolve-zone-name flag on Lexicon client to trigger an actual
  resolution of the zone name from a given FQDN using live DNS servers by leveraging dnspython
  utilities. Most of the time this makes --delegated useless, since Lexicon will be able to guess
  the correct zone name.