Following up to my last patch, I noticed a break; statement was missing 
and cause a bit of a problem with the -echr option.

Fix is attached.

signed-off-by: jason.wessel@windriver.com

Jason Wessel wrote:
> There are two patches attached to show the logical progress of the 
> code and in the case that one is not accepted the work is more easily 
> broken down.
>
> The serial_mux_driver.patch must be applied first.  It adds a generic 
> mux support for the I/O drivers internal to vl.c.  The main purpose is 
> to use it for switching on the monitor.  Basically it allows more than 
> one driver to register an fd_read and fd_can_read routine.  Of course 
> the mux support is generic and could easily be used for other sorts of 
> I/O.  This patch also adds the new options:
>
> -echr ascii_value -- Allow you to use a different control character 
> other than Control-a
> -serial mon:device_string  -- Multiplex the device_string with the 
> monitor functionality
>
> The second patch fully abstracts the monitor so that the monitor can 
> be used on more than one serial port at the same time as well as 
> having a separate dedicated monitor.  I also removed the stdio 
> splitting from the stdio driver.  The mux driver can be used to 
> replace any functionality that I missed.
>
> signed-off-by: jason.wessel@windriver.com
>
> Jason.