cpuminer-opt-3.9.8

Changes to log output to provide data more relevant to actual mining performance.
phi2 can now handle pools with a mix of coins that use and don't use roots.
phi2-lux added as an alias for phi2 as they are identical except for roots.
Add x16rv2 algo for Ravencoin fork.


https://github.com/JayDDee/cpuminer-opt/releases/tag/v3.9.8