* TSIG has been enhanced with TKEY and GSS-TSIG support. Thanks to
Nick Hall for writing this.
+* Zones now can be updated via transactions.
+
+* A new zone subclass, dns.versioned.Zone is available which has a
+ thread-safe transaction implementation and support for keeping many
+ versions of a zone.
+
+* The zone file reading code has been adapted to use transactions, and
+ is now a public API.
+
+* Inbound zone transfer support has been rewritten and is available as
+ dns.query.inbound_xfr() and dns.asyncquery.inbound_xfr(). It uses
+ the transaction mechanism, and fully supports IXFR and AXFR.
+
2.0.0
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