message: allow header sync
diff: @@ -3533,8 +3533,8 @@ bool ProcessNewBlockHeaders(int32_t& nPoSTemperature, const uint256& lastAccepte
  nPoSTemperature++;
  } else { // PoW
  int d = ::ChainActive().Height() - pindex->nHeight;
  - if (fHavePoW || d > 36)
  - nCooling = 0;
  +// if (fHavePoW || d > 36)
  +// nCooling = 0;
  nPoSTemperature -= nCooling;
  nPoSTemperature = std::max((int)nPoSTemperature, 0);
  }
  