Ｔ赾hatroom里如果用 /q username而这个username长度超过允许的长度时
就会将chatroom彻底搞down掉,this must be a bufferoverun problem.
such as /q aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa, soon you will be
kicked out, and chatd died.
tested on freebsd3.1.
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FROM 210.45.208.1