lolMiner 1.26

Changes (over 1.25)

• Slightly improved performance of Ethash on Pascal / Turing & Ampere GPUs (about +0.1 - 0.2 mh per card)
  Performance hint for Pascal cards: 1070 and 1080 best use --mode a, 1070ti best use --mode b
• Further reduced internal latency in Ethash Cuda back end (less stale shares & CPU load)
• Added experimental Grin-C32 kernel for Radeon 6700

Fixes

• Fixed a bug in Cuda back-end to crash with a segfault on Epoch change (introduced in 1.25)
• Fixed a bug that Nvidia-GPUs did not start when Cuda Toolkit was not installed (It reported "No OpenCL devices found ..." - which was complete nonsense)
• Fixed some (rare) potential faults in Beam stratum
• Windows: Fixed message about Light Cache build time was missing (introduced in 1.25)