- update to 4.6.1
  fixes incomplete validation of incoming IXFR transfer in
  the Recursor. It applies to setups retrieving one or more RPZ
  zones from a remote server if the network path to the server
  is not trusted. (bsc#1197525, CVE-2022-27227)

- update to 4.6.0
  Compared to the previous major (4.5) release of PowerDNS Recursor, this
  release contains several sets of changes:
    * The ability to flush records from the caches on a incoming
      notify requests.
    * A rewrite of the outgoing TCP code, adding both re-use of
      connections and support for DoT to authoritative servers or
      forwarders.
    * Many improvements in the area of metrics: more metrics are
      collected and more metrics are now exported in a Prometheus
      friendly way.
    * A new Zone to Cache function that will retrieve a zone (using
      AXFR, HTTP, HTTPS or a local file) periodically and insert the
      contents into the record cache, allowing the cache to be always hot
      for a zone. This can be used for the root or any other zone.
    * An experimental Event Tracing function, providing insight into
      the time taken by the steps in the process of resolving a name.

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