LJ::sysban_create — creates a sysban.
LJ::sysban_create(what, value, bandays, note);
what. the criteria we're sysbanning on
value. the value we're banning
bandays. length of sysban (0 for forever)
note. note to go with the ban (optional)
Takes args as a hash.
1 on success, 0 on failure