Flat armor damagetype reduction

[yaflhdztioxo]

Currently we can make armor (or beings) take a flat amount of damage off the final product... and we can make armor take a percentage off specific types of damage.

With those tools we can also, by simply assigning the same percentage to all known damage types, make an armor that takes a percentage off all damage. But we cannot make an armor that takes a flat amount off only specific damage types. Filling in this gap would be very useful for modders as it's difficult to balance both a flat and percentage based system together. Much easier to stick with one or the other.