void addReplySubcommandSyntaxError(client *c) {
    sds cmd = sdsnew((char*) c->argv[0]->ptr);
    sdstoupper(cmd);
    addReplyErrorFormat(c,
        "Unknown subcommand or wrong number of arguments for '%s'. Try %s HELP.",
        (char*)c->argv[1]->ptr,cmd);
    sdsfree(cmd);
}
void addReplySubcommandSyntaxError(client *c) {
    sds cmd = sdsnew((char*) c->argv[0]->ptr);
    sdstoupper(cmd);
    addReplyErrorFormat(c,
        "Unknown subcommand or wrong number of arguments for '%s'. Try %s HELP.",
        (char*)c->argv[1]->ptr,cmd);
    sdsfree(cmd);
}