test suite fails on the hurd
util/spawn_background_ok: OK util/spawn_background_fail: FAIL test_util.c:1417: assert(stdout_buf == expected_out): <ERR: Failed to spawn background process - code 9/40000002 > vs <ERR: Failed to spawn background process - code 9/2 > [spawn_background_fail FAILED] util/spawn_background_partial_read: OK
ERRNO is not 2 everywhere.
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