Rsync and rdist-like specials

[Joseph McDonald]

Greetings,

We manage a large farm of systems and push changes, patches,
new software, etc. out to our clients using kerberized rdist. It's 
clunky and slow but it's got the magic of specials. Using a special
one can tell rdist that if a particular file changes, preform this
command. So, if we make a change to httpd.conf, we can tell rsync
to bounce httpd. If httpd.conf hasn't change, the process is left
alone. It's perfect for pushing out updated service config files.
Is there anything similar in rsync? Thanks!

	--joey