message: Allow "-" argument to bitcoin-tx
diff: @@ -69,6 +69,9 @@ AllowedArgs& AllowedArgs::addArg(const std::string& strArgsDefinition, CheckValu
  strArgs = strArgsDefinition.substr(0, is_index);
  }
  + if (strArgs == "")
  + strArgs = ",";
  +
  std::stringstream streamArgs(strArgs);
  std::string strArg;
  bool firstArg = true;
  @@ -508,6 +511,7 @@ BitcoinTx::BitcoinTx()
  .addArg("create", optionalBool, _("Create new, empty TX."))
  .addArg("json", optionalBool, _("Select JSON output"))
  .addArg("txid", optionalBool, _("Output only the hex-encoded transaction id of the resultant transaction."))
  + .addDebugArg("", optionalBool, "Read hex-encoded bitcoin transaction from stdin.")
  ;
  }
  