Bug#804706: qpdf 5.2.0 breaks ABI

[Jay Berkenbilt]

Package: qpdf
Version: 5.2.0-1
Severity: grave
Tags: upstream
Justification: causes non-serious data loss

qpdf 5.2.0 breaks ABI compatibility. I am releasing qpdf 6.0.0 and am
uploading a new version of 5.2.0 that reverts the ABI change.