[Dillo-dev] experimental patch: image loading options "same domain", "same host"

I just put together a somewhat hacky patch to add "same host" and "same domain" for image loading from the tools button (or dillorc) http://www.dillo.org/test/img_loading_options.patch I ran on it as long as I could tolerate images over dialup (not long :), so here it is, and I will clean it up if there is interest shown in getting it into dillo. (I would probably want to change the names of the dillorc choices for image loading, make the internal value into an enum, look at the loadImages/autoload_image code duplication, etc., etc... Oh, and look up how to fix the tools menu width...)