message: Fix problems with large json strings in cleos commands
diff: @@ -398,7 +398,7 @@ chain::action create_unlinkauth(const name& account, const name& code, const nam
  fc::variant json_from_file_or_string(const string& file_or_str, fc::json::parse_type ptype = fc::json::legacy_parser)
  {
  - if ( is_regular_file(file_or_str) ) {
  + if ( !boost::istarts_with(file_or_str, "{") && is_regular_file(file_or_str) ) {
  return fc::json::from_file(file_or_str, ptype);
  } else {
  return fc::json::from_string(file_or_str, ptype);
  