tri-state classification

[David Relson]

Greetings,

There's a basic change in bogofilter's classification output that I
think should be made.

In the GETTING.STARTED document, particularly the section on "ongoing
training", thinking and writing in terms of bogofilter's tri-state
abilities seemed especially valuable.  Being able to describe messages
scores as "Spam", "Ham", and "Unsure" is much clearer than describing
them as "X-Bogosity: Yes" and "X-Bogosity: No".

I propose that bogofilter's default configuration be changed to use
tri-state classification with a conservative ham cutoff of 0.4 and with
bogosity tags of "Spam", "Ham", and "Unsure".

Let me know if you approve/disapprove of this change.

Regards,

David

Note:  Sites wishing to continue using bi-state classification, can do
so by adding options "ham_cutoff=0.0" and "spamicity_tags=Yes,No" to
bogofilter.cf