First Release Candidate of PowerDNS Recursor 5.4.0

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   We are proud to announce the first release candidate of PowerDNS
   Recursor 5.4.0!

   Compared to the latest 5.3 release, this pre-release includes the
   following changes:

     * DNS cookies[1] are supported for outgoing connections to
       authoritative servers. This greatly reduces the effectiveness of
       (spoofing) attacks. This feature currently is disabled by default,
       but will be enabled by default in a future release.
     * The server certificate associated with an outgoing DoT
       connection can optionally be validated[2].
     * The emitting of OpenTelemetry trace data can is now controlled by
       conditions[3] based on properties of the incoming query. The trace
       data itself is also more elaborate, enabling more insight in the
       workings of the resolving process.
     * Queries using query type ANY from clients[4] and to
       authoritative[5] servers are now forced to use TCP by default.

   As always, there are also many smaller bug fixes and improvements,
   please refer to the changelog[6] for additional details. When upgrading
   do not forget to check the upgrade guide[7].

   Starting with the previous release the preferred build system is meson.
   We encourage third party package maintainers to switch to meson, as the
   autotools build system will be phased out.

   Please send us all feedback and issues you might have via the mailing
   list[8], or in case of a bug, via GitHub[9]. In particular we would
   like to see feedback regarding the new DNS cookie support feature.

   The tarball[10] (signature[11]) is available from our
   download server[12] and packages for several distributions are
   available from our repository[13].

   Older release trains are supported for one year after the following
   major release. Consult the EOL policy[14] for more details.

   We are grateful to the PowerDNS community for the reporting of bugs,
   issues, feature requests, and especially to the submitters of fixes and
   implementations of features.

References

   1. https://docs.powerdns.com/recursor/yamlsettings.html#setting-yaml-outgoing-cookies
   2. https://docs.powerdns.com/recursor/yamlsettings.html#setting-yaml-outgoing-tls-configurations
   3. https://docs.powerdns.com/recursor/yamlsettings.html#opentelemetrytracecondition
   4. https://docs.powerdns.com/recursor/yamlsettings.html#recursor-any-to-tcp
   5. https://docs.powerdns.com/recursor/yamlsettings.html#outgoing-any-to-tcp
   6. https://doc.powerdns.com/recursor/changelog/5.4.html#change-5.4.0-rc1
   7. https://docs.powerdns.com/recursor/upgrade.html
   8. https://mailman.powerdns.com/mailman/listinfo/pdns-users
   9. https://github.com/PowerDNS/pdns/issues/new/choose
  10. https://downloads.powerdns.com/releases/pdns-recursor-5.4.0-rc1.tar.xz
  11. https://downloads.powerdns.com/releases/pdns-recursor-5.4.0-rc1.tar.xz.sig
  12. https://downloads.powerdns.com/releases/
  13. https://repo.powerdns.com/
  14. https://docs.powerdns.com/recursor/appendices/EOL.html
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