dostuff_switch_lights.py could use MQTT to send commands to goLightCtrl

[nbraud]

This is required to remove the HTTP interface from goLightCtrl: realraum/deckenlichtschalter#1.

[btittelbach]

Adding control via MQTT to goLightCtrl could be a nice feature. Will probably happen in the feature.

We won't get rid of the http interface on goLightCtrl that easily however, since we want to continue to support web clients which don't support websocket. Also you know that Mosquitto as per Debian does not come with websocket compiled in. Also I'm against ever enabling that, since I don't feel comfortable exposing a central point of failure component to web browsers and the additional load that would incur.

[PeterTheOne]

We won't get rid of the http interface on goLightCtrl that easily however, since we want to continue to support web clients which don't support websocket.

http://caniuse.com/#feat=websockets

[nbraud]

According to what @PeterTheOne linked, at least 90% of web browsers support this.
I think it wouldn't be unreasonable to not support outdated browsers for licht.realraum.at