man page for 'blacklistd.conf' has typo "prococol".
Oh, and the sentence following says "the fourth file" instead of "the fourth field". The next paragraph "are controlling" could be simply "control".
FreeBSD actually imports blacklistd. Its canonical source is NetBSD. Please report this bug upstream instead. https://www.netbsd.org/cgi-bin/sendpr.cgi?gndb=netbsd
A commit references this bug: Author: emaste Date: Tue May 19 00:15:19 UTC 2020 New revision: 361230 URL: https://svnweb.freebsd.org/changeset/base/361230 Log: blacklistd.conf.5: typo/grammar fixes PR: 246467 Submitted by: Mike Lempriere Changes: head/contrib/blacklist/bin/blacklistd.conf.5
(In reply to Alan Somers from comment #2) That is true, but I have incorporated a number of blacklistd minor bugfixes or improvements into FreeBSD and coordinated with Christos @ NetBSD for upstreaming. I committed these changes to FreeBSD as r361230 and let Christos know.