[PATCH windows] windows: add an experimental option for long paths support

[Matt Harbison]

On Mon, 09 Oct 2017 20:54:54 -0400, Augie Fackler <raf at durin42.com> wrote:

> On Mon, Oct 09, 2017 at 02:38:04AM -0700, Kostia Balytskyi wrote:
>> # HG changeset patch
>> # User Kostia Balytskyi <ikostia at fb.com>
>> # Date 1507541423 25200
>> #      Mon Oct 09 02:30:23 2017 -0700
>> # Node ID aa5c7de6a86ba8bbc7d46bb414ac7ee6fbde3a4a
>> # Parent  a57c938e7ac8f391a62de6c7c4d5cf0e81b2dcf4
>> windows: add an experimental option for long paths support
>
> queued, thanks
>
> Let's make sure this gets prominently noted in the release notes for
> 4.4, and if nobody notices issues with it we'll just make it default
> for 4.5 or 4.6.

I assume FB rolls their own installers, but any idea how we (optionally)  
get this into the hands of other users?  I assume most Windows users  
aren't running from source, in order to build the wrapper.  Is this  
something that a pip install would be able to handle?

Even though I just questioned why both this and the registry setting are  
required, it may be a good idea to reference the registry setting in the  
release notes too, so the external diff tools don't puke.