3D armour for every graphics card

• New: shaders: false on a 3D armour set. The shaders that draw a set need a graphics card with OpenGL 4.5, and a player whose computer lacks it (older integrated graphics, a Mac) got "Resource reload failed" and lost the whole pack, not only the armour. With shaders: false the pack carries no shader for that set, so it loads for everybody and every player sees the armour drawn by the server. See 3D armour.
• Fixed: groups inside a bone group (a cape inside body) no longer fill the console with "not one of the bones" warnings. They always rode their bone; only the warning was wrong.
• Fixed: an item with armor3d: no longer warns that its equipment texture is missing. It wears the set's piece, so it never needed one.