bug#10398: [PATCH] Use real vfork under Cygwin: it's fine these days

["Drew Adams" <drew.adams@oracle.com>]

> I think it's a good change.  And I don't think we should make 
> an effort to support Cygwin versions earlier than 1.7.
> Cygwin 1.5 is no longer supported by Cygwin, so I don't see
> a reason for emacs to try to support it.  I suspect there
> have been many emacs changes that are not compatible with
> Cygwin 1.5.

Dunno what is meant here by "support Cygwin", but FWIW (probably not much) I
still use Cygwin 1.5.  I do so because it seems to work OK for my use cases and
because I have come across lots of problems reported here and there wrt later
versions (and Emacs).

(Yes, I know, you can find whatever problems you want on the Internet, real or
wrong.  Still, why upgrade if I don't need to?)

I do not run Emacs inside Cygwin, but I use Cygwin's `grep' and other commands
from Emacs, and I use Cygwin's bash shell interactively.

I probably won't be upgrading Cygwin anytime soon unless I'm forced to.  But I'm
no doubt not your typical Cygwin user.  Just one data point to consider.  Or
not.