Get/Set TELNET port
Input
[ESP131]<port> json=<no> pwd=<admin/user password>
- 
json=no the output format can be in JSON or plain text
 - 
pwd=
the admin password if authentication is enabled  - 
port
 - if port is empty, it will display current port
 - if port is not empty, it will set the port
 
Output
- In json format
 
cmdId of requested command, should be131statusstatus of command, should beokdatacontent of response, here the port
