message: Add log output during initial header sync
diff: @@ -3327,6 +3327,12 @@ bool ProcessNewBlockHeaders(const std::vector<CBlockHeader>& headers, CValidatio
  }
  }
  NotifyHeaderTip();
  + {
  + LOCK(cs_main);
  + if (::ChainstateActive().IsInitialBlockDownload() && ppindex && *ppindex) {
  + LogPrintf("Synchronizing blockheaders, height: %d (~%.2f%%)\n", (*ppindex)->nHeight, 100.0/((*ppindex)->nHeight+(GetAdjustedTime() - (*ppindex)->GetBlockTime()) / Params().GetConsensus().nPowTargetSpacing) * (*ppindex)->nHeight);
  + }
  + }
  return true;
  }
  