bulk mode

[David Relson]

Bob,

Your analysis is correct.  The bulk mode switches, '-b' and '-B', were 
originally intended for use in classifying multiple messages - something 
bogofilter couldn't do before version 0.12.  Since bogofilter _could_ 
register multiple messages (using mbox format), and since a maildir can be 
easily converted to a mbox, registration doesn't _have_ to work with bulk mode.

That being said, it may be easy to change registration to work with bulk 
mode.  As your debugging output showed, there's a loop in classify() to 
open the next file and classify its message.  This loop may be reusable for 
bulk mode registration.

At the moment, I'm considering whether or not to make registration and bulk 
mode, i.e. '-b' and '-B', work together.  The simplest "fix" to the 
segfault problem is to declare that registration and bulk mode are 
incompatible and have bogoconfig check for that option combination and 
complain.

However, I'll likely spend some time and see if I can "make it work right".

David