// The UDP ASSOCIATE request is used to establish an association within
// the UDP relay process to handle UDP datagrams. The DST.ADDR and
// DST.PORT fields contain the address and port that the client expects
// to use to send UDP datagrams on for the association. The server MAY
// use this information to limit access to the association. If the
// client is not in possession of the information at the time of the UDP
// ASSOCIATE, the client MUST use a port number and address of all
// zeros. RFC1928
好像是用大写开头来判断是否是一个句子开头,但是会误判一些变量和专有名词
会合并成这样,还有这个zero不知道为什么没有合并到上一行
把A和D改成小写之后就是这样,zero还是没有合并