Reduces the plasma cutter main rate (#4785)

What the title says, it was really high, having around 15% of instakilling someone on the first hit, if aiming at head, and 30% of chance of cutting a leg or arm at the first hit, this should reduce those chances. The main feature also takes in consideration the armor. So, plasma cutters are far more effective against less armored foes, limbs and xenos at all.

code/modules/projectiles/guns/energy/mining.dm

@@ -320,7 +320,7 @@
 	tracer_type = /obj/effect/projectile/tracer/plasma_cutter
 	impact_type = /obj/effect/projectile/impact/plasma_cutter
 	maiming = 1
-	maim_rate = 3
+	maim_rate = 1
 
 /obj/item/projectile/beam/plasmacutter/on_impact(var/atom/A)
 	if(istype(A, /turf/simulated/mineral))

code/modules/projectiles/projectile.dm

@@ -125,7 +125,7 @@
 		can_be_maimed and maim_bonus are defined on 'obj/item/organ/external'.
 		*/
 		if(organ.can_be_maimed && maiming)
-			if(prob(maim_rate * (organ.get_damage() * organ.maim_bonus)))
+			if(prob((maim_rate * (organ.get_damage() * organ.maim_bonus) - (armor/2))))
 				organ.droplimb(clean_cut,maim_type)
 
 	if (damage_type == BRUTE)

code/modules/projectiles/projectile/bullets.dm

@@ -196,7 +196,7 @@
 	armor_penetration = 80
 	hitscan = 1 //so the PTR isn't useless as a sniper weapon
 	maiming = 1
-	maim_rate = 60
+	maim_rate = 3
 	maim_type = DROPLIMB_BLUNT
 
 /obj/item/projectile/bullet/rifle/vintage