message: Correct constant
  I noticed HIGH_MAX_TX_FEE is unused.  There was probably an incorrect
  merge conflict resolution done previously; restore to the correct constant.
diff: @@ -3257,7 +3257,7 @@ bool CWallet::ParameterInteraction()
  CAmount nMaxFee = 0;
  if (!ParseMoney(mapArgs["-maxtxfee"], nMaxFee))
  return UIError(AmountErrMsg("maxtxfee", mapArgs["-maxtxfee"]));
  - if (nMaxFee > HIGH_TX_FEE_PER_KB)
  + if (nMaxFee > HIGH_MAX_TX_FEE)
  UIWarning(_("-maxtxfee is set very high! Fees this large could be paid on a single transaction."));
  maxTxFee.value = nMaxFee;
  if (CFeeRate(maxTxFee.value, 1000) < ::minRelayTxFee)
  