binary delta generator and prototype RCS replacement
Lacking something better, I just snip a bit from the announcement [felix]

I have placed version 0.20 of Xdelta, a binary delta generator and
prototype RCS-replacement program at:

  ftp://ftp.xcf.berkeley.edu/pub/xdelta/xdelta-0.20.tar.gz

Maintainer: The OpenBSD ports mailing-list <ports@openbsd.org>

WWW: http://www.xcf.berkeley.edu/~jmacd/xdelta.html
