说明：  linux环境下多人聊天程序。包括服务器端和客户端程序，采用IPv6地址。对于学习socket套接字编程有帮助，使用了许多标准的库函数，可以参考任何一本Unix/Linux网络编程书籍进行学习。
(linux environment than chat program. Including server-side and client procedures, the use of IPv6 addresses. Socket socket learning programming help, using a number of standard library functions, one can refer to any Unix/Linux network programming books to learn.)