- fixed support different drivers for RDNA/RDNA2 gpu's
- implemented ghostrider
hints: Polaris and Vega gpu's can boost from --opencl-threads 2 parameter and higher intensity(like --opencl-launch 2048). Just consider available memory on your gpu. 2048 will use 4Gb + a bit more, so 4Gb won't work. Try lower values like 1792 or 1920.