Added ghast achievement and nerfed ghast

* ghast now attacks less frequently
* killing ghast with a ghast fireball now awards an achievement

mods/ENTITIES/mcl_mobs/init.lua

@@ -368,6 +368,7 @@ function mcl_mobs.register_arrow(name, def)
 		on_punch = def.on_punch or function(self, puncher, time_from_last_punch, tool_capabilities, dir, damage)
 			local vel = self.object:get_velocity():length()
 			self.object:set_velocity({x=dir.x * vel, y=dir.y * vel, z=dir.z * vel})
+			self._puncher = puncher
 		end,
 		collisionbox = def.collisionbox or {0, 0, 0, 0, 0, 0},
 		automatic_face_movement_dir = def.rotate

mods/ENTITIES/mobs_mc/ghast.lua

@@ -53,7 +53,7 @@ mcl_mobs.register_mob("mobs_mc:ghast", {
 	view_range = 64,
 	attack_type = "dogshoot",
 	arrow = "mobs_mc:fireball",
-	shoot_interval = 3,
+	shoot_interval = 5,
 	shoot_offset = -0.5,
 	dogshoot_switch = 1,
 	dogshoot_count_max =1,
@@ -131,6 +131,10 @@ mcl_mobs.register_arrow("mobs_mc:fireball", {
 			damage_groups = {fleshy = 6},
 		}, nil)
 		mcl_mobs.mob_class.boom(self,self.object:get_pos(), 1, true)
+		local ent = mob:get_luaentity()
+		if not ent or ent.health <= 0 then
+			awards.unlock(self._puncher:get_player_name(), "mcl:fireball_redir_serv")
+		end
 	end,
 
 	hit_node = function(self, pos, node)

mods/HUD/mcl_achievements/init.lua

@@ -550,6 +550,13 @@ awards.register_achievement("mcl:obsidian", {
 	type = "Advancement",
 	group = "Overworld",
 })
+awards.register_achievement("mcl:fireball_redir_serv", {
+	title		= S("Fireball Redirection Service"),
+	description = S("Defeat a ghast with his own weapon."),
+	icon		= "mcl_fire_fire_charge.png",
+	type = "Advancement",
+	group = "Nether",
+})
 
 awards.register_achievement("mcl:hero_of_the_village", {
 	title = S("Hero of the Village"),