OpenBSD 7.3 changed its implementation of
pthread_get_name_np/pthread_set_name_np to wrap new libc functions
getthrname/setthrname and lowered the max buffer size from 32 to 24.
This is not a backwards-compatible change because if we were to put in
comptime version logic to use size 32 when target < 7.3 the binaries
would be undefined when running on >= 7.3. It also could simply be that
OpenBSD has a policy to not support older binaries running on newer
releases? Regardless, the safest course is to simply use the smallest
known buffer size.
As an aside, this bug manifested as a "hung" std.Thread test because 7.3
pthread API never checks for error result when wrapping getthrname/setthrname.
This is not a problem in std.Thread when we use the correct max buffer
size because ERANGE/EINVAL become unreachable.
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