增加自定义TCP协议设备监控

[boyucjz]

实现方案：
1.配置设备IP及端口号
2.配置请求消息
3.配置回复消息解析规则（起始字节、结束字节、数据类型）

[MasamiYui]

Maybe we can expand on port telnet monitor？

[boyucjz]

建议从这几个框架里选择 Java NIO 、Netty（MessageToByteEncoder、ByteToMessageDecoder）

[MasamiYui]

It looks like a Tcp heartbeat detection mechanism. Do we need to implement it? @tomsun28

[tomsun28]

hi if need detect tcp available, the current telent monitoring can support this.