Chained tokens
Fast Bayesian spam filter along lines suggested by Paul Graham
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m-a
A chained tokens implementation and an option to use it.
Should be disabled by default as it will take much more
resources.
Whatever to use it could also be saved in the database
upon db creation so not to mix chained/not chained
types by mistake.
Consept found here:
http://www.ultraviolet.org/mail-archives/bogofilter.2003/1787.html