Enhance mithril armor (#70)

* Enhance mithril armor

Mithril armor should be (at least) tougher than diamond armor. Mithril is found rarer and deeper than diamond and mithril tools are already better than diamond tools.

* Enhance mithril shield

Mithril armor should be (at least) tougher than diamond armor. Mithril is found rarer and deeper than diamond and mithril tools are already better than diamond tools.

* Correct armor_use

Now this enhance the durability by a factor 3 (instead of a factor 2) compared to diamond. Which can be justified by the ore generation update in moreores (deeper and rarer (but less scattered)).

* Correct armor_use

Now this enhance the durability by a factor 3 (instead of a factor 2) compared to diamond. Which can be justified by the ore generation update in moreores (deeper and rarer (but less scattered)).

* correct typo

3d_armor/armor.lua

@@ -718,8 +718,8 @@ if armor.materials.mithril then
 	armor:register_armor("3d_armor:helmet_mithril", {
 		description = S("Mithril Helmet"),
 		inventory_image = "3d_armor_inv_helmet_mithril.png",
-		groups = {armor_head=1, armor_heal=12, armor_use=100},
-		armor_groups = {fleshy=15},
+		groups = {armor_head=1, armor_heal=13, armor_use=66},
+		armor_groups = {fleshy=16},
 		damage_groups = {cracky=2, snappy=1, level=3},
 	})
 	--- Mithril Chestplate
@@ -736,8 +736,8 @@ if armor.materials.mithril then
 	armor:register_armor("3d_armor:chestplate_mithril", {
 		description = S("Mithril Chestplate"),
 		inventory_image = "3d_armor_inv_chestplate_mithril.png",
-		groups = {armor_torso=1, armor_heal=12, armor_use=100},
-		armor_groups = {fleshy=20},
+		groups = {armor_torso=1, armor_heal=13, armor_use=66},
+		armor_groups = {fleshy=21},
 		damage_groups = {cracky=2, snappy=1, level=3},
 	})
 	--- Mithril Leggings
@@ -754,8 +754,8 @@ if armor.materials.mithril then
 	armor:register_armor("3d_armor:leggings_mithril", {
 		description = S("Mithril Leggings"),
 		inventory_image = "3d_armor_inv_leggings_mithril.png",
-		groups = {armor_legs=1, armor_heal=12, armor_use=100},
-		armor_groups = {fleshy=20},
+		groups = {armor_legs=1, armor_heal=13, armor_use=66},
+		armor_groups = {fleshy=21},
 		damage_groups = {cracky=2, snappy=1, level=3},
 	})
 	--- Mithril Boots
@@ -772,8 +772,8 @@ if armor.materials.mithril then
 	armor:register_armor("3d_armor:boots_mithril", {
 		description = S("Mithril Boots"),
 		inventory_image = "3d_armor_inv_boots_mithril.png",
-		groups = {armor_feet=1, armor_heal=12, armor_use=100},
-		armor_groups = {fleshy=15},
+		groups = {armor_feet=1, armor_heal=13, armor_use=66},
+		armor_groups = {fleshy=16},
 		damage_groups = {cracky=2, snappy=1, level=3},
 	})
 end

shields/init.lua

@@ -328,8 +328,8 @@ if armor.materials.mithril then
 	armor:register_armor("shields:shield_mithril", {
 		description = S("Mithril Shield"),
 		inventory_image = "shields_inv_shield_mithril.png",
-		groups = {armor_shield=1, armor_heal=12, armor_use=100},
-		armor_groups = {fleshy=15},
+		groups = {armor_shield=1, armor_heal=13, armor_use=66},
+		armor_groups = {fleshy=16},
 		damage_groups = {cracky=2, snappy=1, level=3},
 		reciprocate_damage = true,
 		on_damage = function(player, index, stack)