message: Use a longer thread sleep for stake miner during IBD.
diff: @@ -816,6 +816,11 @@ void BitcoinMiner(std::shared_ptr<CReserveScript> coinbaseScript, bool fProofOfS
  boost::this_thread::interruption_point();
  #ifdef ENABLE_WALLET
  if (enablewallet && fProofOfStake) {
  + if (IsInitialBlockDownload()) {
  + MilliSleep(60000);
  + continue;
  + }
  +
  //Need wallet if this is for proof of stake
  auto pwallet = GetMainWallet();
  