[ccan] dgraph, tlist, tcon: MSVC error due to array of flexible structs

[Rusty Russell]

David Gibson <david at gibson.dropbear.id.au> writes:
> IIRC, Rusty didn't want to simply replace the tlist module in case
> there could be subtle brekages in usage.

BTW, I think this gives us good reason to simply mv tlist2 -> tlist and
fix up the callers.

Cheers,
Rusty.