Log Message:
Add tap(4) support for *BSD, written by kiyohara@.

The patch was proposed on some mailing lists back in 2013, but
unfortunately, left uncommitted until today:

    https://mail-index.netbsd.org/port-sparc64/2013/01/29/msg001951.html

It works perfectly for me on NetBSD/amd64 for sun[23].

Bump revision.