message: fPreferHeaders should be false when initialized
  We always assume that a peer does not prefer headers until and
  unless they send us the SENDHEADERS p2p message.
diff: @@ -24,7 +24,7 @@ CNodeState::CNodeState(CAddress addrIn, std::string addrNameIn) : address(addrIn
  nBlocksInFlight = 0;
  nBlocksInFlightValidHeaders = 0;
  fPreferredDownload = false;
  - fPreferHeaders = true;
  + fPreferHeaders = false;
  }
  /**
  