Does not check for updates.

Checks for updates and notifies of availability (in console/log).

Checks for updates, downloads them if available, and prompts to install. Behavior is frontend-specific: in ServerGUI, a dialog is shown with the list of changes and options to update immediately or next time. In ServerCLI, asks to type in 'y' to confirm updating or press any other key to skip. '''Note: Requires user interaction (if you restart the server remotely while unattended, it may get stuck on this dialog).'''

Checks for updates, automatically downloads and installs the updates, and restarts the server.