Update to 4.1.0
IMPORTANT: This release removes support for recursor pass-through.
This might impact a lot of people!
More information can be found here (including other
improvements/fixes/changes):
https://blog.powerdns.com/2017/11/30/powerdns-authoritative-server-4-1/
Changelog: https://doc.powerdns.com/authoritative/changelog/4.1.html
PR: 224028
Submitted by: maintainer
Approved by: mat (mentor)
Differential Revision: https://reviews.freebsd.org/D13339