Rigel 1.2.1

• (Kaspa) Minor performance improvements, mainly Pascal GPUs
• Add --mt parameter to enable memory tweaks for GDDR5/GDDR5X Pascal GPUs

Bug fixes

• (Kaspa) Stale shares when mining to ks_pplns
• (Windows) Miner sometimes fails to find NVML library (e.g. driver 466.77)
• --fan-control argument validation is broken