"# LANChat"
- same ID warning, or stop use hashmap / use unique keys.
- port in use error (automatically quits the app).
- normal closure hashmap remove error (on exit).
- private message function.
- quit function.
- UDP update user list.
- message interface.
- enter to send.
- bar location in the middle.
- closing resources upon quitting.
- UDP connection, error.