add --print-uris or --dry-run

Wget needs a --print-uris or --dry-run option, to show what it would get/do without actually doing it! Not only can one check if e.g., -B will do what they want before actually doing it, one could also use wget as a general URL extractor, etc. --debug is not what I'm talking about. I'm more

--print-uris

Wget should have a --print-uris option, to tell us what it is planning to get, so we can adjust things without making commitment yet. Perhaps useful with -i or -r...