message: further reduce sync threshold
diff: @@ -5246,8 +5246,9 @@ void BitcoinMiner(CWallet *pwallet, bool fProofOfStake)
  while (vNodes.empty())
  MilliSleep(1000);
  - while (Checkpoints::GuessVerificationProgress(pindexBest)<0.9998)
  + while (Checkpoints::GuessVerificationProgress(pindexBest)<0.996)
  {
  + printf("Minter thread sleeps while sync at %f\n",Checkpoints::GuessVerificationProgress(pindexBest));
  strMintWarning = strMintSyncMessage;
  MilliSleep(10000);
  }
  