Add SHA512 support in crypto.c
gtank added SHA512 support to crypto.c in https://github.com/gtank/tor/tree/8961-big
This ticket tracks the SHA512 support separately to the replay cache work in #8961 (moved).
gtank added SHA512 support to crypto.c in https://github.com/gtank/tor/tree/8961-big
This ticket tracks the SHA512 support separately to the replay cache work in #8961 (moved).