[PATCH v2] exewrapper: prefer HackableMercurial python if availbale

[David Soria Parra]

On Mon, Mar 13, 2017 at 01:06:41PM -0700, Kostia Balytskyi wrote:
> # HG changeset patch
> # User Kostia Balytskyi <ikostia at fb.com>
> # Date 1489434253 25200
> #      Mon Mar 13 12:44:13 2017 -0700
> # Node ID 83925d3a3306e7023b4b43757812285b40fcd90b
> # Parent  7548522742b5f4f9f5c0881ae4a2783ecda2f969
> exewrapper: prefer HackableMercurial python if availbale
> 
> Currently hg.exe will only try to load python27.dll from hg-python
> subdir if PYTHONHOME environment variable is not set. I think that
> it is better to check whether 'hg-python' subdir exists and load
> python from it in that case, regardless of environment. This allows
> for reliable approach of distributing Mercurial with its own Python.

FWIW this looks good to me