message: [client] do not panic on empty lines
diff: @@ -94,7 +94,10 @@ fn main() -> std::io::Result<()> {
  match readline {
  Ok(line) => {
  let params = parse_cmd(&line);
  - match alias_to_cmd.get(params[0]) {
  + if params.is_empty() {
  + continue;
  + }
  + match alias_to_cmd.get(&params[0]) {
  Some(cmd) => cmd.execute(&mut client_proxy, &params),
  None => match params[0] {
  "quit" | "q!" => break,
  