bug#1483: cleanup: replace NO_SOCKETS_IN_FILE_SYSTEM in emacsclient.c

[Eli Zaretskii <eliz@gnu.org>]

> Date: Wed, 3 Dec 2008 07:24:11 -0800 (PST)
> From: Dan Nicolaescu <dann@ics.uci.edu>
> Cc: 1483@emacsbugs.donarmstrong.com
> 
> jasonr@f2s.com writes:
> 
>   > Quoting Dan Nicolaescu <dann@ics.uci.edu>:
>   > 
>   > > NO_SOCKETS_IN_FILE_SYSTEM is the same as WINDOWSNT, so better replace it
>   > > and have one less identifier to worry about.
>   > 
>   > Does DOS have unix domain sockets?
> 
> Is DOS using emacsclient?

No, it doesn't.  And probably never will (emacsclient does not work at
all in the MS-DOS port).

But I agree with Jason and Juanma: replacing the above symbol with
just WINDOWSNT gains very little, but obfuscates the condition being
tested.  If anything, I'd support the opposite changes: replace each
and every ugly system name such as WINDOWSNT with a meaningful symbol
whose name would explain what is the underlying (mis)feature.