[openssl-dev] Work on a new RNG for OpenSSL

[Salz, Rich]

For windows RAND_bytes should just call CryptGenRandom (or its equiv).  For modern Linux, probably call getrandom(2).  For OpenBSD call arc4random().

Getrandom() is a syscall, and I have concerns about the syscall performance.  I would rather feed getrandom (or /dev/random if that’s not available) into a FIPS DRBG generator.

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