monitor webpages for updates
This script is intended to help you watch URLs and get notified (via
email or in your terminal) of any changes. The change notification will
include the URL that has changed and a unified diff of what has changed.

The script supports the use of a filtering hook function to strip
trivially-varying elements of a webpage.

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

WWW: http://thp.io/2008/urlwatch/
