merging back from xoseperez

Add support for Allnet ESP8266_UP_Relay

Ctrl-d for telnet

support for luani HVIO https://luani.de/projekte/esp8266-hvio

removing hardcoded ota settings still in some platformio environments

Initial support for Itead Sonoff POW R2

Fixed multiple toggles due to repeated code

used tabs instead of spaces,
change variable name to the one which is more uniform across the project,
fixed bug about condition always being true

some remotes repeat the code within 200ms thus toggling the relay twice , this fixes the toggle function.

Set PMS sensor type dynamically

So you can add more different PMS sensors.

RFB_DIRECT sonoff bridge hardware bypass of the RF microcontroller

Refine PMSX003 to support PMS5003T/PMS5003ST.

Added IR Toggle Mode

Added samsung AA59-00608A , to toggle relays for a 8CH Relay Board

And found DEBUG_MSG could not be used in the sensors header file.

1. Support PMS5003T/PMS5003ST;
2. Replace data reading method;
3. Remove PMS library dependency;
4. Support smart sleeping mode to extend the sensor’s lifetime.

Add SenseAir S8 CO2 sensor support