pdfinfo: add -url option to print all URLs in a PDF
This adds a -url
option to pdfinfo that prints all the Link Annotation URLs. The PDF spec lists a few other types of URLs besides annotations. As far as I can tell, Poppler only supports annotation URLs. My intention is to print these other types when Poppler supports them. For this reason, the output includes a 'Type' column even though the only type currently listed is 'Annotation'.