[PATCH v5 1/2] mime node: Record depth-first part numbers

[Tomi Ollila]

On Mon, 23 Jan 2012 18:33:09 -0500, Austin Clements <amdragon at MIT.EDU> wrote:
> This makes the part numbers readily accessible to formatters.
> Hierarchical part numbering would be a more natural and efficient fit
> for MIME and may be the way to go in the future, but depth-first
> numbering maintains compatibility with what we currently do.
> ---

LGTM. Good that the comment about dropping const is gone.

Tomi