bug#8132: 23.1; comint shell replaces \ in paths with /

[Eli Zaretskii]

> From: Michael Albinus <michael.albinus@gmx.de>
> Cc: monnier@iro.umontreal.ca,  zvrba.external@zvrba.net,  8132@debbugs.gnu.org
> Date: Wed, 02 Mar 2011 09:42:47 +0100
> 
> shell -> make-comint-in-buffer -> comint-exec -> comint-exec-1 -> 
> start-file-process
> 
> If default-directory is remote, start-file-process invokes Tramp.

If someone uses remote default-directory with cmd.exe, they deserve
this complication.

That said, if we wrap the file completion with cmd-sensitive code, we
can easily make it cater to remote default-directories.