Merge #890: [Miner][Randomx] Optimised RandomX for each machine

de4253d Added file with support for better optimised RandomX (Strontium)

Pull request description:

  ### Problem ###
  The RandomX miner is running in light mode.

  ### Root Cause ###
  This issue was reported by a third party developer who also decided to submit the patch himself, through Strontium.

  ### Solution ###
  Need explanation

  ### Bounty Payment Address ##
  `sv1`

  ### Unit Testing Results ###
  How to test?

Tree-SHA512: 8610edbac2490a97e74c523644e3a3bf4366ce9253071cafdea47752c0ca160a6e3577551f3f00ddfca610b7d07c06b01ff30b688304b597f2e1cb9a3c64be51

Author: codeofalltrades

src/pow.cpp

@@ -488,12 +488,12 @@ void StartRandomXMining(void* pPowThreadGroup, const int nThreads, std::shared_p
         boost::this_thread::interruption_point();
         if (!fInitialized) {
             boost::this_thread::interruption_point();
-            auto full_flags = RANDOMX_FLAG_FULL_MEM;
-
-            myMiningCache = randomx_alloc_cache((randomx_flags)global_randomx_flags);
+            auto full_flags = RANDOMX_FLAG_FULL_MEM | randomx_get_flags();
+            LogPrint(BCLog::BLOCKCREATION, "%s: RandomX flags set to %s\n", __func__, full_flags);
+            myMiningCache = randomx_alloc_cache(full_flags);
 
             /// Create the RandomX Dataset
-            myMiningDataset = randomx_alloc_dataset((randomx_flags)global_randomx_flags);
+            myMiningDataset = randomx_alloc_dataset(full_flags);
             mining_key_block = GetKeyBlock(chainActive.Height());
 
             randomx_init_cache(myMiningCache, &mining_key_block, sizeof(mining_key_block));