/STATUS [online|avail|free|dnd|notavail|away [-|StatusMessage]]
 /STATUS message -|StatusMessage

Show or set the current status.
If no status is specified, display the current status.
If a status message is specified, it will overrride the message* variables (these variables can be set in the configuration file).
If no relevant message* variable is set and no status message provided, the current status message is kept.
If StatusMessage is "-", the current status message is cleared.
With the "/status message" command, mcabber will update the message while preserving the status.