bogofilter, spamoracle): rewrite registration/unregistration
functions to take a list of articles and the unregister option.
Much hilarity ensues.
+ (spam-initialize): spam-stat-maybe-{save,load} already respect spam-use-stat
+ (spam-stat-register-ham-routine, spam-stat-register-spam-routine):
+ don't load and save unnecessarily
* spam-stat.el (spam-stat-dirty): new variable, set when the stats
database is modified