Furnace should warm player up too

A furnace is producing much heat, this should give the player the oportunity to warm himselve up (or overheat himselve if he is in the desert at day and standing too close at the active furnace…).
Furnaces should give about 20% comfort in my oppinion and help the player to survive long winter nights better (e.g. heats up player for +4°).

Furnaces were supposed to add comfort like 2-3 patches ago. It even worked on the dev server builds. Then for some unknown reason they dropped it.