3.2.0 - 2019-05-05
    * ACME challenge response TXT RRs are now emitted with a TTL of zero by
      default, which makes things work reliably in some tricky corner cases
      with ACME providers.  This can be overridden via the new config option
      "acme_challenge_dns_ttl".
    * The minimum configurable value for "min_ttl" was reduced from 1 to 0.
    * The "min_ttl" setting now correctly clamps small TTLs for SOA records.
    * All out of zone glue addresses (truly out of zone, not just within a
      local delegation) now generate a warning on zonefile loading (or an error
      if zones_strict_data is in effect).  Support for out of zone glue will
      likely be removed in a future major version bump, as it's basically
      useless and non-recommended in the DNS in general at this point in
      history, and supporting it is needlessly complicated.
    * Minor refactorings, nit-fixes, and docs updates.