message: server: set default value of key as "key"
diff: @@ -29,7 +29,7 @@ struct Args {
  #[structopt(short = "d", long, default_value = "./db", parse(from_os_str))]
  /// NSS database directory.
  db: PathBuf,
  - #[structopt(short = "k", long)]
  + #[structopt(short = "k", long, default_value = "key")]
  /// Name of keys from NSS database.
  key: Vec<String>,
  