[netflow-tools] Latest format update diff

[Damien Miller]

Damien Miller wrote:
> oh, one more thing: please rotate your existing flowd logfile out of the
> way before running an snapshot or this patch.
> 
> There are no checks (yet) against appending new-format records to an
> old-format logfile so you will end up with a messed up log. If you make
> this mistake, it is possible to recover using the Unix hexdump(1) and
> split(1) utilities (and some patience), but it is best not to make the
> mistake in the first place :)

BTW these checks were implemented two days ago.

-d