Hi,
When i try to install knot via ports as your documentation says
https://www.knot-dns.cz/docs/2.4/html/installation.html
it points me to a verison of 2015
https://www.freshports.org/dns/knot
Can you guys change the line to
# cd /usr/ports/dns/knot3 just to be more clear for a new user of freebsd
https://www.freshports.org/dns/knot3
Com os meus melhores cumprimentos,
André Cruz