[ale] monitoring a web page

[joh6nn at hotpop.com]

i use urlmon
(http://www.ibiblio.org/pub/Linux/apps/www/mirroring/urlmon-4.0.tgz).
it's ancient, but it's easy to use, and works very well for me.  can
check a page's md5 hash, or it's last-modified header.

-joh6nn