need testers for a new memory patch

[Justin Mason]

So, I have a new patch that should greatly improve memory usage
if you have a low memory situation (where "low" == "< 100MB of
free RAM", typically ;)

It should apply cleanly to 3.0.0.   I'd be very interested in
feedback from people trying it... here it is:

  http://bugzilla.spamassassin.org/show_bug.cgi?id=3983

It adds a couple of spamd command-line switches, but should do sane things
if you use your existing switches as-is.

--j.