hash table to replace Judy

[Matthias Andree]

On Tue, 17 Sep 2002, Gyepi SAM wrote:

> I have attached the diffs to bogofilter.[ch], the files wordhash.[ch], and xmalloc.[ch], which are pretty simple.
> The corresponding changes to configure.in is pretty simple and has been omitted.

I'm not the release manager, but can we hold this until after 0.7.4? In
that time, someone can do some benchmarking.

I'm not sure if I recall this correctly, but did perchance DB offer a
"no-file" hash mode? If so, that might be far easier, because we depend
on DB anyways.