OpenSystemsDevelopment / qpdf

This reverts commit ff2a78f579ebdd06b417e34260a17dba06e71137, reversing
changes made to 8f54319f7a6514110f4b05cbbf1cb1c9fc8cb6a0.

Add new commands --remove-metadata and --remove-info

A file that has Widget annotations that can't be mapped back to form
fields would crash qpdf json.

Accept --file and --range as named parameters in additional to
allowing positional arguments. This is in preparation for adding
additional flags.

The check for the number of items was in the wrong place.

Rather than adding yet another flag that is almost never useful on its
own, just have --remove-restrictions disable digital signatures. The
operations are still separate in the API.

Fix exit code when an input other than the primary input generates wa…

m-holger's fix is better

This reverts commit fa3cdaf1b46dcbb583393f93a02f89207ba21a88.

Ensure copied annotations are fixed (fixes #600)

Case where pages from a main input without /AcroForm key were duplicated
was omitted

Using search and replace.

Add new convenience class QPDFObjGen::Guard

Code tidy re-throwing of exceptions

Warn if catalog type entry is invalid (fixes #810)