The author is an OpenBSD developer talking about crypt(3) which supports bcrypt hashes:
http://www.openbsd.org/cgi-bin/man.cgi/OpenBSD-current/man3/...OpenBSD implemented bcrypt more than 17 years ago
http://cvsweb.openbsd.org/cgi-bin/cvsweb/src/lib/libc/crypt/...