NOTES:

The denyhost fork merged back with the original denyhosts, so this port name
is an anachronism.
The nftables project is featureful enough to make this port obsolete anyway,
so it's being marked unmaintained to give current users a chance to
replace their denyhosts setup with the nftables equivalent (dynamically
updated sets).

REQUIREMENTS:

python2, for now. There's an open pull request that promises python3
compatibility, but it hasn't received enough code review compared to the
easier alternative: replicate the desired functionality using nftables.

POST-INSTALL:

Edit /etc/denyhosts/denyhosts.conf as needed.

Edit /etc/inetd.conf, for example:

#<service_name> <sock_type> <proto> <flags> <user> <server_path> <args>
sshd		stream	tcp	nowait	root	/usr/sbin/sshd in.sshd

Add inetd and denyhosts to services array on /etc/rc.conf, after net and
before all the services supervised by denyhost and inetd (not sure if this
is necessary but it might be wise to allow protection before the services
start).