The links in the unbound documentation e.g. http://man.openbsd.org/unbound#SEE_ALSO do not share format with the other OpenBSD docs http://man.openbsd.org/cat#SEE_ALSO , so that the references not are hyperlinks in the web version.
https://cvsweb.openbsd.org/cgi-bin/cvsweb/src/usr.sbin/unbound/doc/ Normally OpenBSD man pages link by .Xr and the unbound man pages don't. Tinker
