Remove fainting and direct starvation as a game mechanic.

• In its place, just permanently and repeatedly decrement the hero’s Strength or Constitution while they are in the Starving range (when nutrition ≤ 0) until the hero dies from stat loss.
• The reduction happens when you hit -N nutrition, and it gets reset to 0 when this happens.
• Permanent reduction is done by reducing the current ‘‘and highest-reached’’ values of the stat by 1, so restore ability won’t restore its full previous value.
• Since Fainting was pretty lethal already, the interval between losing points should be pretty short.
• When you eat something, before adding the nutrition from the food, your nutrition resets to 0.
• Sustain ability prevents stat loss but makes you faint instead.