Add GNU/Hurd support

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 97.35%. Comparing base (70b59d6) to head (43b8a26). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #2086 +/- ## ========================================== + Coverage 97.24% 97.35% +0.11% ========================================== Files 144 142 -2 Lines 20028 19945 -83 Branches 228 228 ========================================== - Hits 19476 19418 -58 + Misses 525 500 -25 Partials 27 27 ```

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[briansmith]

Thank you!