bug#2136: cleanup: Fresume_tty and Fsuspend_tty

[Eli Zaretskii]

> Date: Sat, 31 Jan 2009 12:14:25 -0800 (PST)
> From: Dan Nicolaescu <dann@ics.uci.edu>
> Cc: 2136@emacsbugs.donarmstrong.com
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
>   > > Date: Sat, 31 Jan 2009 10:46:45 -0800 (PST)
>   > > From: Dan Nicolaescu <dann@ics.uci.edu>
>   > > Cc: 
>   > > 
>   > > These functions should not have any #ifdef MSDOS  or #ifdef 
> subprocesses,
>   > > they cannot be used on such systems.
>   > 
>   > The only uses up till now don't have any trouble.
> 
> Can you please describe exactly how you used them?

For suspend-tty, I also used suspend-frame.  For resume-tty, I just
invoked it directly.