Update included popt to version 1.7

[Max Bowsher]

[I'm assuming Lapo meant to send this to the list. -- Max.]

Lapo Luchini wrote:
> Max Bowsher wrote:
> 
>> Granted, these are mainly compilation fixes for popt itself, but they
>> presumably indicate systems which often do not have a system popt.
>> 
> Wouldn't the "best" solution to propose this patch to the official popt,
> ni case they are really "general" and "userful"?
> This would save both space and compatibility.