reftable: some more portability improvements

Hi,

this patch series contains the last set of portability improvements that currently sits in the reftable implementation of libgit2 1. With these patches merged lbigit2 is able to fully reuse the reftable library while only having to provide its own system headers.

Thanks!

Patrick

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{ "series": { "revision": 1, "change-id": "20260330-pks-reftable-portability-fixes-36ebf9f227c2", "prefixes": [], "presubject": "" } }

Implements Improve portability of the reftable library (#697 - closed).