Let Clang choose whichever C++ library it prefers
Add HMAC_DRBG
Add --program-suffix option to configure
Add RFC 6979 nonce generator. Also some HMAC_DRBG cleanups.
Simpify HMAC_RNG reseeding process. Actually update HMAC_DRBG reseed counter.
Add rng command which can dump RNG outputs or raw entropy samples