Test switching to OpenSSL

[namazso]

Since 3.0 OpenSSL is licensed under Apache2 license which would allow incorporating it into GPL software like OpenHashTab. It could replace the BLAKE2sp dependency, and allow adding others from the BLAKE2 family, Whirlpool, GOST R 34.11-94 (the older russian national standard), SM3 (chinese national standard), MDC-2

[vertigo220]

This might speed up calculations as well.