This patch is a follow-up to D3600 / rP25130.
There are a number of non-buildable structures in the `simulation/templates/structures/` folder that have `template_structure.xml` as their parent. Their resistances vary (h, p, c: {1, 1, 1}, {1, 10, 1}, {2, 5, 2}, {2, 10, 2}). This patch gives them all the same resistance ({1, 10, 1}) and sets this in the shared parent. Those that used to have 2 crush and hack resistance get +10% health to compensate; the effect on gameplay and balance is negligible (1/0.9=1.111).
The advantage is fewer lines in fewer files, making things easier to maintain.