message: Change testnet difficulty to match mainnet parameters
diff: @@ -186,8 +186,8 @@ public:
  consensus.posLimit = uint256S("0000ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff");
  consensus.nPowTargetTimespan = 16 * 60; // 16 minutes
  consensus.nPowTargetSpacing = 2 * 64;
  - consensus.fPowAllowMinDifficultyBlocks = true;
  - consensus.fPowNoRetargeting = false;
  + consensus.fPowAllowMinDifficultyBlocks = false;
  + consensus.fPowNoRetargeting = true;
  consensus.fPoSNoRetargeting = false;
  consensus.nRuleChangeActivationThreshold = 1512; // 75% for testchains
  consensus.nMinerConfirmationWindow = 2016; // nPowTargetTimespan / nPowTargetSpacing
  