OpenSystemsDevelopment / qpdf

Positional arguments are supported in a backward-compatible way, but
completion no longer guides users to it.

JSON accepts scientific notation, but PDF doesn't.

If /AP is a dictionary of streams rather than a dictionary of
dictionaries, disregard /AS, which is supposed to point to a subkey of
one of the dictionaries. This fix prevents qpdf's annotation
flattening from discarding some annotations when /AS is erroneously
set.

Lazily load MD5 and RC4 once in the life of the program. Only load the
legacy provider if RC4 is actually being used.

From time to time, someone has a problem because their build is
grabbing an old version of qpdf header files that are installed
somewhere on their system. I am hoping this will put an end to that.

Some new symbols were exported.

These markers are being added for nested classes that are already
marked with QPDF_DLL_CLASS. They don't make any different on Linux,
but they matter on Windows.