message: doc: Clarify sendrawtransaction::maxfeerate==0 help
diff: @@ -1054,7 +1054,9 @@ static UniValue sendrawtransaction(const JSONRPCRequest& request)
  "\nAlso see createrawtransaction and signrawtransactionwithkey calls.\n",
  {
  {"hexstring", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "The hex string of the raw transaction"},
  - {"maxfeerate", RPCArg::Type::AMOUNT, /* default */ FormatMoney(DEFAULT_MAX_RAW_TX_FEE), "Reject transactions whose fee rate is higher than the specified value, expressed in " + CURRENCY_UNIT + "/kB\n"},
  + {"maxfeerate", RPCArg::Type::AMOUNT, /* default */ FormatMoney(DEFAULT_MAX_RAW_TX_FEE),
  + "Reject transactions whose fee rate is higher than the specified value, expressed in " + CURRENCY_UNIT +
  + "/kB.\nSet to 0 to accept any fee rate.\n"},
  },
  RPCResult{
  "\"hex\" (string) The transaction hash in hex\n"
  