I've just committed John Simpson's onchange patch. I've added the ability to enable it with --enable-onchange-script, and a file README.onchange. I've also suppressed a few calls to the script that I considered redundant.
It should be available in anonymous CVS within a couple of hours.Tom: Is there any reason I can't put this on a live server. It is based on 5.4.16, so are there any major problems left in that?