T-Rex 0.24.6

* ("ethash") Improve LHR unlocker, LHR tune value increased from 71 to 74 by default.
   The new LHR tune scale is somewhat different, so it's recommended to let autotune find the optimal parameters
   (in other words, for the first run, remove "--lhr-autotune-mode" and "--lhr-tune" parameters from your bat file if they are set)