> +     /* Encode the PID (with 1 bit of randomness) into 3 base-64 chars */
> +     pid = getpid() | (arc4random() & 0x00020000);

What is the purpose of this? It looks hugely wasteful to me. If you
really need a single random bit, it is not good to waste a block of
hard-gained gryptographic randomness; can you not use a pseudo-random

Mark Murray
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