利用多客户端telnet支持向vxworks增加一个用户she-adding a user shell to vxWorks using the multi-client telnet support

vxworks下远程多shell客户端例程。-vxworks shell client remotely and more routine.

Vxworks上实现TCP通讯的例子程序，能够实现客户端和服务器的通信，服务器可以同时与多个客户端连接，代码简单注释清晰。-Achieve TCP communication on Vxworks example program enables communication between the client and the server, the server can simultaneously connect with multiple clients, the code is simpl