[Spambayes] degeneration

[Neale Pickett]

So one of the more interesting things I left the spam conference with
was Paul Graham's notion of "degeneration".  The idea is simple.  If you
tokenize "FREE!!!!", but that's not in your wordlist, try the following
until you get a match:

  FREE!!!!
  Free!!!!
  free!!!!
  FREE!!!
  Free!!!
  free!!!
  FREE!!
  Free!!
  free!!
  FREE!
  Free!
  free!
  FREE
  Free
  free

He claims this helps a lot.  I'm currently in the midst of getting
hammiefilter to integrate more cleanly with Gnus and Mutt, and merging
mboxtrain and hammiebulk.  But this should be relatively easy to
implement and test.  Any takers?

Neale