[PATCH 2 of 2] commands: add template support for config

[Yuya Nishihara]

On Mon, 19 Sep 2016 09:14:42 -0500, Mathias De Maré wrote:
> # HG changeset patch
> # User Mathias De Maré <mathias.demare at gmail.com>
> # Date 1472447235 -7200
> #      Mon Aug 29 07:07:15 2016 +0200
> # Node ID c037f0fbd6374b5855373a82056015289910fe69
> # Parent  084ca55ce77a5fe77bc93db26346cc71211a0070
> commands: add template support for config

Queued this, thanks.

>   Note: I'm not quite sure about the best approach to handling
>   the 'print the full config' case.
>   For me, it printed the 'ui.promptecho' key at the end.
>   I went with globs there as that at least tests the json display reliably.

Maybe we can switch HGRCPATH to get cleaner result? IIRC, the order of
ui.walkconfig() is deterministic.