bug#24656: 25.1; Emacs leaves lock files on a CIFS share

[Eli Zaretskii]

> Cc: jsynacek@redhat.com, 24656@debbugs.gnu.org
> From: Paul Eggert <eggert@cs.ucla.edu>
> Date: Tue, 11 Oct 2016 09:53:40 -0700
> 
> On 10/11/2016 09:29 AM, Eli Zaretskii wrote:
> > I thought we wanted a different character to minimize
> > the risk of errors in parsing the link name.
> 
> Ah, OK, perhaps it's due to worries about interoperating with an older 
> Emacs scheme that used just "USER@DOMAIN" without the trailing 
> ".PID:BOOT". If so, we should use some string that cannot be interpreted 
> as a valid domain name by an ancient Emacs. So, how about using '..' 
> instead of ':'? That is, "USER@DOMAIN.PID..BOOT". This should work since 
> a valid domain name cannot contain "..".

Sounds fine to me.  I just tried this on a Windows filesystem, and it
allows that, so Samba should, too.