--- Comment #3 from Ian Lepore <i...@FreeBSD.org> ---
I just stumbled across this; I updated ntp.conf to use the pool keyword last
year, without realizing this PR was here. I didn't realize until finding this
that the -4/-6 flags had become meaningless in ntp.conf. I've opened a
phabricator review to make that part of your changes to ntp.conf