net.createConnection()
创建新的 net.Socket 的工厂函数立即启动与 socket.connect() 的连接，然后返回启动连接的 net.Socket。
¥A factory function, which creates a new net.Socket,
immediately initiates connection with socket.connect(),
then returns the net.Socket that starts the connection.
建立连接后，将在返回的套接字上触发 'connect' 事件。最后一个参数 connectListener（如果提供）将被添加为 'connect' 事件的监听器一次。
¥When the connection is established, a 'connect' event will be emitted
on the returned socket. The last parameter connectListener, if supplied,
will be added as a listener for the 'connect' event once.
可能的语法有：
¥Possible signatures:
-
net.createConnection(path[, connectListener])用于 IPC 连接。¥
net.createConnection(path[, connectListener])for IPC connections. -
net.createConnection(port[, host][, connectListener])用于 TCP 连接。¥
net.createConnection(port[, host][, connectListener])for TCP connections.
net.connect() 函数是此函数的别名。
¥The net.connect() function is an alias to this function.