experimental QDBM TXN patch

[Matthias Andree]

Stefan Bellon <sbellon at sbellon.de> writes:

>> I'd avoid that mode for now and only train on "unsures" or messages
>> that bogofilter sorted into the wrong category. It's _a lot_ faster
>> that way.
>
> ... and transactions are rarely used this way. ;-)

More importantly, I am wondering what guarantees QDBM's transactional
interface really makes. Looks like Atomicity and Consistency, but not
Isolation or Durability (system crash).

-- 
Matthias Andree