[PATCH 7 of 7 V3] util: enable hardlink for copyfile

[Mads Kiilerich]

On 03/12/2017 01:23 AM, Jun Wu wrote:
> # HG changeset patch
> # User Jun Wu <quark at fb.com>
> # Date 1489309403 28800
> #      Sun Mar 12 01:03:23 2017 -0800
> # Node ID 9da40a9e54c419490a2ff23b9dda7acc109f81cd
> # Parent  de28b62236a7d47a896bc4aba2bd95dcd8defc87
> # Available At https://bitbucket.org/quark-zju/hg-draft
> #              hg pull https://bitbucket.org/quark-zju/hg-draft -r 9da40a9e54c4
> util: enable hardlink for copyfile

I guess this should reference 
https://bz.mercurial-scm.org/show_bug.cgi?id=4580 .

Also, I wonder if hghave has_hardlink should be kept in sync with this.

/Mads