[PATCH 1 of 4 V3] lfs: special case the null:// usercache instead of treating it as a url

[Yuya Nishihara]

On Wed, 11 Apr 2018 19:31:42 -0400, Matt Harbison wrote:
> # HG changeset patch
> # User Matt Harbison <matt_harbison at yahoo.com>
> # Date 1523482195 14400
> #      Wed Apr 11 17:29:55 2018 -0400
> # Node ID 11de91e25707a7acb2052fe87fe7aacde88b65ca
> # Parent  8478b198af9cb96463582be895f0b9a06747a13c
> lfs: special case the null:// usercache instead of treating it as a url

Queued, thanks.