bug#37189: 25.4.1: vc-hg-ignore implementation is missing

[Eli Zaretskii]

> Cc: dgutov@yandex.ru, 37189@debbugs.gnu.org
> From: Wolfgang Scherer <Wolfgang.Scherer@gmx.de>
> Date: Sun, 23 Feb 2020 00:32:27 +0100
> 
> What about the unwillingness of src status -a to recurse into
> sub-directories, how does that correspond to Git, which can
> often not be stopped to recurse?

I was talking about this issue only from the POV of VC.  VC doesn't
have to recurse, it can always run with default-directory set to the
repository root, when SRC is the backend.