OpenSystemsDevelopment / qpdf

The commit was assigned to the previously fixed issue by mistake.

Now the tests intermix old and new syntax, ensuring both are
exercised.

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

Add the command-line arguments. They don't do anything yet.

JSON accepts scientific notation, but PDF doesn't.

Add a CI job to test qpdf with other than the default zlib
implementation. This incldues a check that the new zlib really is not
the default, so the new test will fail if the default because zlib-ng.

By combining --linearize with --compress-streams=n, we ensure that no
new compressed data will appear in linearized output, which makes the
output independent of zlib's output. There are other tests to ensure
that linearization works correctly with compression. This commit
involves changing some test outputs and test code as well just
updating test suites.

For the modified test case, we care about successful recovery, not
about the exact offsets. Add a filter to remove the specific numbers
from show-xref.

Rationale is in comments in the code. Deterministic ID tests
explicitly do not use this tool.

If we ignore /ID[1], we need to make sure deterministic IDs are
tested properly.

Fix all tests where the only required fix is to run qpdf-test-compare
instead of doing a simple file comparison.

Fix doc typos

Future build

Change default for SF_FlateLzwDecode::columns to 1