Fix leather greaves to be worn on LEGS, not FEET

[bozimmerman]

I understand the thinking here, but this specific change doesn't account for greaves in other skills, the correct numeric stat values, or availability of items for all slots. I'll bring this to the attention of the design braintrust though, and appreciate the heads-up.

[bozimmerman]

Well, the braintrust was all handy, so I asked, and the problem is this: We wanted to have Greaves really bad, but also Leggings, Canon, Skirts, etc. The problem is that we have LEGS and FEET. We do NOT have 'upper legs' and 'lower legs' wear positions, so the upper was chosen arbitrarily to be 'legs' and lower 'feet'.