6 Toggles your 'open' variable open/not open [1/0]. When open is set to 1,
7 you are open to receive match requests from other users. When it is set to 0,
8 you will not receive match requests from others, but you will be notified that
9 such requests have been made to you and ignored automatically.
11 See Also: match variables
13 [Last modified: October 8, 1995 -- Friar]