bug#6784: 24.0.50; cmdproxy incosistency with command pathnames

[Eli Zaretskii]

> From: Óscar Fuentes <ofv@wanadoo.es>
> Cc: 6784@debbugs.gnu.org
> Date: Tue, 03 Aug 2010 19:52:22 +0200
> 
> > For cmd.exe, the problem is a lesser one, but it still exists; e.g.,
> > cmd.exe is limited to 4K long commands, while CreateProcess can handle
> > 32K.
> 
> That's one more incosistency: a long command works fine, then you put
> that command as part of a pipe chain and it stops working.

Perhaps we should bite the bullet and implement redirection and pipes
within cmdproxy.