Make default 'AVX2 blake2 optimizaion' disabled by default
Make default 'AVX2 blake2 optimizaion' disabled by default

litecoinz-project/litecoinz,litecoinz-project/litecoinz,litecoinz-project/litecoinz,litecoinz-project/litecoinz,litecoinz-project/litecoinz,litecoinz-project/litecoinz