[Dillo-dev]dpip dialog for https (and dpis in general)

Hi there, In the afternoon I had a prototype working, wich BTW was very pleasing to see working, after living a long time as an abstract design. It needed some touches, and while working on them, some hidden bugs outside its scope showed in nav.c's repost dialog. Short story, I decided to integrate some code in interface.c with the new dialog renderer, use a more flexible design and fix the bugs. I'll test and upload tomorrow. Cheers Jorge.-