Removing all the olds minetest.env calls

- All the minetest.env calls removed

It took me about 2 hours, but I did it, and it works!

mods/moreores/old_init.lua

@@ -724,8 +724,8 @@ local function generate_ore(name, wherein, minp, maxp, seed, chunks_per_volume,
 					local y2 = y0+y1
 					local z2 = z0+z1
 					local p2 = {x=x2, y=y2, z=z2}
-					if minetest.env:get_node(p2).name == wherein then
-						minetest.env:set_node(p2, {name=name})
+					if minetest.get_node(p2).name == wherein then
+						minetest.set_node(p2, {name=name})
 					end
 				end
 			end