up @lock (#1855)

     @lock =. Locks to a specific key(s). can be specified as or #, or as 'me' or 'here'. 
Boolean expressions are allowed, using '&' (and), '|' (or), '!' (not), and parentheses 
('(' and ')') for grouping. To lock to a player, prefix their name with '*' (ex. 
'*Igor'). Ex. '@lock in = keycard & !magnet': to use the exit 'in', one must carry 
the keycard and not the magnet; '@lock note = me | *Friend': only you or 'Friend' 
may pick up the 'note' thing.