message: Initialize all variables for CNodeState
diff: @@ -16,12 +16,15 @@ CNodeState::CNodeState()
  pindexLastCommonBlock = nullptr;
  pindexBestHeaderSent = nullptr;
  fSyncStarted = false;
  + fSyncStartTime = -1;
  + fFirstHeadersReceived = false;
  + nFirstHeadersExpectedHeight = -1;
  + fRequestedInitialBlockAvailability = false;
  nDownloadingSince = 0;
  nBlocksInFlight = 0;
  nBlocksInFlightValidHeaders = 0;
  fPreferredDownload = false;
  - fPreferHeaders = false;
  - fRequestedInitialBlockAvailability = false;
  + fPreferHeaders = true;
  }
  /**
  