...

There's an admin page entry for it; you need to even crack the source. Bottom of admin/<listname>/digest, if it's the same place as in 2.1 (and it looks like it is; I'm just not running 2.0.x so I can't verify easily).

Not in 2.0.x there's not. At least that I can see. That's a 2.1.x thing.

You're right; I was looking at the 2.1 sources (didn't think I had them on this machine).

Looks to me then like there's no way other than bin/withlist. Variables are 'volume' and 'next_digest_number'. I base the "there's no way" on the fact that I can't find an assignment to 'volume' anywhere (besides its original init to 1).