[ccan] Relicensing ccan/list under BSD?

[Rusty Russell]

Hi all,

        This is kind of embarrassing.  I wanted to use ccan/list in an
internal project for which the license has yet to be decided, and so I'd
to relicense it under BSD-MIT (it's currently LGPL).

Andrey did a non-trivial patch, so I'll need his permission; Brad and
Vladimir did textual fixes but it's still nice to have your OK too.

Thanks!
Rusty.