- update to version 2.1.0:
* End-of-line comments are now associated with rdata when read from text.
For backwards compatibility with prior versions of dnspython, they are
only emitted in to_text() when requested.
* Synchronous I/O is a bit more efficient, as we now try the I/O and only
use poll() or select() if the I/O would block.
* The resolver cache classes now offer basic hit and miss statistics, and
the LRUCache can also provide hits for every cache key.
* The resolver has a canonical_name() method.
* There is now a registration mechanism for EDNS option types.
* The default EDNS payload size has changed from 1280 to 1232.
* The SVCB, HTTPS, and SMIMEA RR types are now supported.
* 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.