dns/powerdns: Update to 4.4.0

• This release drops GSS/TSIG support, please see PowerDNS Security Advisory 2020-06.

• New features:
  • the LMDB backend now supports long record content, making it production ready for everybody
  • the SVCB and HTTPS record types are supported, with limited additional processing transaction handling in the 2136 handler and the HTTP API was again improved a lot, avoiding various spurious issues users may have noticed if they do a lot of changes a new setting (consistent-backends) offers a roughly 30% speedup, subject to conditions
  • we finally emit Prometheus metrics!

• Improvements:
  • don’t log trusted-notification-proxy notify at error level
  • Stop using incbin and use od & sed to generate constant string data.

• Bug Fixes:
  • clear the LMDB set state when performing a new lookup or list to prevent corruption cases
  • SVCB: Correctly parse and print unknown params
  • fix direct-dnskey in AXFR-out

Please make sure to read the upgrade notes before upgrading:
https://doc.powerdns.com/authoritative/upgrading.html

PR: 251945
Submitted by: Ralf van der Enden (maintainer)
Reviewed by: osa (mentor)
Approved by: osa (mentor)
Security: 61d89849-43cb-11eb-aba5-00a09858faf5
Differential Revision: https://reviews.freebsd.org/D27680