[syslinux] comments about 5.00pre10

[H. Peter Anvin]

On 11/21/2012 02:04 PM, Matt Fleming wrote:
> On Sat, 2012-11-17 at 21:09 +0000, Matt Fleming wrote:
>>> 7_ When using menu.c32, the boot prompt behaves as if MENU CLEAR is 
>>> always used. I previously reported this when testing menu.c32 to 
>>> pwd.c32, but the same happens with any other image or even with 
>>> [ESC].
>>
>> OK, I'll look into this.
> 
> Looks like Peter was the one that changed this,
> 
> commit 6ab02b6682c0b693b3e4f9afcc2ab8775f804f0a
> Author: H. Peter Anvin <hpa at zytor.com>
> Date:   Tue Mar 27 14:39:46 2012 -0700
> 
>     menu: Make "menu clear" the default
>     
>     Make "menu clear" the default... it was sort of implicitly so at least
>     for vesamenu when using the old system, since we would end up zapping
>     the mode when any output happened, but that no longer is the case.
>     
>     Also move the cursor to the top of the screen.
>     
>     Signed-off-by: H. Peter Anvin <hpa at zytor.com>
> 
> Ady, unless you know of a reason where this isn't wanted, I'm inclined
> to just leave Peter's commit as-is.
> 

That being said, we really need a way to *disable* boolean options.
Either something like "MENU NO CLEAR" or "MENU CLEAR OFF".

Either way we should make it uniform syntax across all the boolean
options.  I'm kind of thinking that "MENU NO CLEAR" would work well;
"MENU NO" would simply set a flag that we're clearing options instead of
setting them, and then parse the following keyword.

	-hpa