[PATCH] cext: extract revlog/index parsing code to own C file

[Augie Fackler]

On Sat, May 20, 2017 at 02:01:33PM -0700, Gregory Szorc wrote:
> # HG changeset patch
> # User Gregory Szorc <gregory.szorc at gmail.com>
> # Date 1495314065 25200
> #      Sat May 20 14:01:05 2017 -0700
> # Node ID 1f0b5d45f4c31ee29ab45c5f64489bead32c7f89
> # Parent  f7553d2d6887b30b7d8e8150020c97943fdb7ffd
> cext: extract revlog/index parsing code to own C file

queued, thanks, a nice improvement

(In general I'd like us to get better about having a clearer split
between "pure C" and "Python C" so we can start doing some stuff with
libfuzzer...)