Fixed|Heretic|Renderer: Torch timeout and rendering with no attenuation

The engine rendered all torch light (player's fixedColorMap) with
distance attenuation. This is originally due to Hexen using attenuation.

Added DD_FIXEDCOLORMAP_ATTENUATE that controls whether the renderer
uses distance attenuation for fixed color maps. Heretic now disables
this feature.

Also fixed the missing timeout for the Torch in Heretic (2 minutes).