[PATCH] experimenting with new parsing rules

[michael at optusnet.com.au]

David Relson <relson at osagesoftware.com> writes:
[...]
> The changes have been modified somewhat by me.  Consistent with the rest
> of bogofilter, the header prefix is now "head:".  

I shortened it to 'h:' in view of the number of tokens
involved and the impact on the database size... :)

Michael, wanting a decent patricia trie implementation to get the
database sizes back down to something reasonable.