.. Copyright (C) Internet Systems Consortium, Inc. ("ISC")
..
.. SPDX-License-Identifier: MPL-2.0
..
.. This Source Code Form is subject to the terms of the Mozilla Public
.. License, v. 2.0.  If a copy of the MPL was not distributed with this
.. file, you can obtain one at https://mozilla.org/MPL/2.0/.
..
.. See the COPYRIGHT file distributed with this work for additional
.. information regarding copyright ownership.

Notes for BIND 9.19.23
----------------------

New Features
~~~~~~~~~~~~

- Added RESOLVER.ARPA to the built in empty zones. :gl:`#4580`

Feature Changes
~~~~~~~~~~~~~~~

- Memory consumption of the new QP-trie database has been optimized. Large
  zones, which used to require significantly more memory with QP-trie, now only
  require roughly 15% more memory than the old red-black tree data structure.
  :gl:`#4614`

- The :any:`sortlist` option has been deprecated and will be removed in a
  future BIND 9.21.x release. Users should not rely on a specific order of
  resource records in DNS messages.  :gl:`#4593`

- The ``fixed`` value for the :any:`rrset-order` option and the corresponding
  ``configure`` script option have been deprecated and will be removed in a
  future BIND 9.21.x release. Users should not rely on a specific order of
  resource records in DNS messages.  :gl:`#4446`


Bug Fixes
~~~~~~~~~

- A bug in the keymgr code unintentionally slowed down some DNSSEC key
  rollovers. This has been fixed. :gl:`#4552`

- Two bugs that could have caused resolvers configured with the new cache data
  structure to crash or hang have been fixed. :gl:`#4622` :gl:`#4652`

- Some ISO 8601 durations were accepted erroneously, leading to shorter
  durations than expected. This has been fixed. :gl:`#4624`

Known Issues
~~~~~~~~~~~~

- There are no new known issues with this release. See :ref:`above
  <relnotes_known_issues>` for a list of all known issues affecting this
  BIND 9 branch.