bug#57400: 29.0.50; Support sending patches from VC directly

[Eli Zaretskii]

> From: Philip Kaludercic <philipk@posteo.net>
> Cc: juri@linkov.net,  rpluim@gmail.com,  57400@debbugs.gnu.org,  ane@iki.fi
> Date: Sat, 15 Oct 2022 15:15:02 +0000
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >    If the optional argument FORCE is non-nil, the returned value is
> >    allowed to include revision specifications like \"master~8\"
> >    (the 8th parent of the commit currently pointed to by the master
> >    branch), otherwise such revision specifications are rejected, and
> >    the function returns nil.
> 
> Sounds good to me.

Great!