Booting up

These add Western boots (moar Stylish footgear), spawns, and a recipe
for making them.

Also Nerfs combat boots based on IRC commentary that US Army boots are
Not Fun to move in.  ->2 Encumbrance, on par with Winter boots.

(Western, built more for looking good than for running, have 4
Encumbrance but can be fitted to 3.)
Less-Nerf'd

I presume Rivet wears properly-fitted combat boots.
Merge pull request #4857 from KA101/Booting

Booting up