message: Don't disable difficulty adjustment for testnet
  This should only be disabled for regtest
diff: @@ -182,8 +182,8 @@ public:
  consensus.nPowTargetTimespan = 16 * 60; // 16 minutes
  consensus.nPowTargetSpacing = 2 * 64;
  consensus.fPowAllowMinDifficultyBlocks = true;
  - consensus.fPowNoRetargeting = true;
  - consensus.fPoSNoRetargeting = true;
  + consensus.fPowNoRetargeting = false;
  + consensus.fPoSNoRetargeting = false;
  consensus.nRuleChangeActivationThreshold = 1512; // 75% for testchains
  consensus.nMinerConfirmationWindow = 2016; // nPowTargetTimespan / nPowTargetSpacing
  consensus.vDeployments[Consensus::DEPLOYMENT_TESTDUMMY].bit = 28;
  