Makes biter bases and worms INDESTRUCTIBLE by making them 100% immune to all 8 vanilla factorio damage types.

As seen in Michael Hendriks' YouTube series "Factorio DeathWorld but Biter Bases are INDESTRUCTIBLE..."

Doesn't work for mods which introduce new classes of damage to factorio, only the 8 vanilla damage classes are covered. You can hack the mod and add the new damage types in yourself, or you can try to fix my crappy code attempt in the file doesntwork.txt and run that instead.