ippsample v2026.04

All,

It has been a really long time since the last snapshot release of the IPP sample code so I figured I would push this one out for people to have a specific release to work with:

    https://github.com/istopwg/ippsample/releases

This is a non-production snapshot release of the IPP sample code which updates the embedded CUPS library to v3.0.1 and embedded PDFio library to v1.6.2, fixes the Docker and Windows builds, adds support for canceling and releasing jobs in the web interface, and fixes bugs in the IPP Shared Infrastructure Extensions v1.1 implementation.

I've also promoted this version of the "ipp" snap to stable for those installing ippsample on Linux via the Snapcraft store.

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Michael Sweet