locking

[tallison at tacocat.net]

> As long as you're only reading the wordlist, there are no problems.
>
> Matthias' transaction code, currently experimental, promises additional
> protection from database problems.
>

Good to know.
I should in theory, be able to run everything through without locking if I
remove the '-u' option and manually (re)train everything if I'm so driven.

Is the experimental code in 0.17.2?