[Spambayes] training via email forwarding

[Rich Salz]

I'll most definitely send my diffs along.

I connect to the server from two hosts, work (linux) and home (windows),
so running a proxy isn't convenient.

Basically I have a mail server where I can run procmail, and not much
more.

At this point, I've learned/realized/been-taught that the only real
difference between forwarding and mboxtrain is the latter requires (a)
cron; and (b) periodic clean-out of the spam.

I'll try to whip up a patch.
	/r$