OpenSystemsDevelopment / qpdf

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

Tune handling of sparse arrays in QPDF_Array

Sparse arrays are rare. Dynamically create the variables needed to manage
them only when needed.

Tweaks to QPDF::read_xref, removeObject and getCompressibleObjGens

Holding release to think about recently discovered incorrect handling
of deleted generations.

This reverts commit 162716807c475498dfbecc89fd222fb6c45d70c9.

This includes an expected failure for a file with a dangling
reference to an old generation.

Change set visited to std::vector<bool>

Swap front and back, and change queue from list to vector

The old code didn't put one there, and it's not really useful. It just
makes the file (trivially) larger.

This commit contains the changes from generate_auto_job based on
manual changes from the previous commit.

This commit contains only the manual changes. It is separated for
clarity. This commit would not pass CI because it lacks the automated
changes, which appear in the next commit.

This is converging into something that will be possible to do.