ser-unix.c: Add hardware flow control support

[Eli Zaretskii]

> Date: Fri, 30 Mar 2007 12:54:50 +0100 (BST)
> From: "Maciej W. Rozycki" <macro@mips.com>
> cc: Chris Dearman <chris@mips.com>, "Maciej W. Rozycki" <macro@linux-mips.org>
> 
> 2007-03-30  Chris Dearman  <chris@mips.com>
>             Maciej W. Rozycki  <macro@mips.com>
> 
> 	* ser-unix.c (show_serial_hwflow): New function.
> 	(hardwire_raw): Add hardware flow control support.
> 	(_initialize_ser_hardwire): Add set/show remoteflow.
> 
>  OK to apply?

Not without a corresponding change to the manual that describes this
new command.