message: Change pid from qtum.pid to qtumd.pid
diff: @@ -102,7 +102,7 @@ static const char* FEE_ESTIMATES_FILENAME="fee_estimates.dat";
  /**
  * The PID file facilities.
  */
  -static const char* BITCOIN_PID_FILENAME = "qtum.pid";
  +static const char* BITCOIN_PID_FILENAME = "qtumd.pid";
  static fs::path GetPidFile()
  {
  