change MDNS server's name

Signed-off-by: Manson Li <manson.li@matchstick.tv>
Modify the response of application's state.
Application maybe in starting state while launching.

Signed-off-by: Manson Li <manson.li@matchstick.tv>
Disable MDNS server temporarily.
We will refactor it in the future.

Signed-off-by: Manson Li <manson.li@matchstick.tv>