fix: Use redis over SSH channel(#2057)

[slowrookie]

useage:

     sshConfig := &ssh.ClientConfig{
		User:            "root",
		Auth:            []ssh.AuthMethod{ssh.Password("password")},
		HostKeyCallback: ssh.InsecureIgnoreHostKey(),
		Timeout:         15 * time.Second,
	}

	client, err := ssh.Dial("tcp", "remoteIP:22", sshConfig)
	if err != nil {
		log.Println(fmt.Errorf("%v", err))
	}

	cli := redis.NewClient(&redis.Options{
		Addr: net.JoinHostPort("127.0.0.1", "6379"),
		Dialer: func(ctx context.Context, network, addr string) (net.Conn, error) {
			return client.Dial(network, addr)
		},
		ReadTimeout:  -1,
		WriteTimeout: -1,
	})
       
       

[monkey92t]

This seems to lose ctx.Deadline?

[monkey92t]

But few people use ssh to connect to redis. We can ignore ctx.Deadline

In addition, we need to pay attention to the v9 version connCheck(conn.SetDeadline(time.Time{})