Rely on `std/sysrand` (around since 2021) & clean-ups
Make fall-back to true-randomized hash salting much more system-portable.
Also some minor clean-ups with 4 adix/oats test/demo programs & std/ qualified imports.
Make fall-back to true-randomized hash salting much more system-portable.
Also some minor clean-ups with 4 adix/oats test/demo programs & std/ qualified imports.