Make "old esc mode" key timeout configurable

[Pavel Tsekov]

On Thu, 10 Aug 2006, Leonard den Ottolander wrote:

> On Thu, 2006-08-10 at 12:37 +0300, Pavel Tsekov wrote:
>> Maybe you've missed a patch I submitted some months ago regarding the same
>> issue ?
>
> Yes, so it seems. Sorry. I've asked Denis to update his patch about 1
> 1/2 weeks ago. Too bad *you* didn't notice *that* ;) .

At least change the name of the variable to something 
easier to type. Also a prefix showing that it is 
related to MC might be useful.