[PATCH 0/5] MR7631: server: Clarify between effective thread priority and class/level.

[Rémi Bernon]

Split from https://gitlab.winehq.org/wine/wine/-/merge_requests/7516, with some minor tweaks and putting the tests first. I'll send more adjustments for the rest after.

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https://gitlab.winehq.org/wine/wine/-/merge_requests/7631