Merge pull request #11476 from kevinz000/shield_refactor

Completely overhauls how blocking, shields, reflecting, and anything in between is handled. Has some small gameplay effects.

code/datums/components/wearertargeting.dm

@@ -19,4 +19,4 @@
 		UnregisterSignal(equipper, signals)
 
 /datum/component/wearertargeting/proc/on_drop(datum/source, mob/user)
-	UnregisterSignal(user, signals)
+	UnregisterSignal(user, signals)

code/datums/martial/sleeping_carp.dm

@@ -237,7 +237,7 @@
 	else
 		return ..()
 
-/obj/item/twohanded/bostaff/hit_reaction(mob/living/carbon/human/owner, atom/movable/hitby, attack_text = "the attack", final_block_chance = 0, damage = 0, attack_type = MELEE_ATTACK)
-	if(wielded)
-		return ..()
-	return FALSE
+/obj/item/twohanded/bostaff/run_block(mob/living/owner, atom/object, damage, attack_text, attack_type, armour_penetration, mob/attacker, def_zone, final_block_chance, list/block_return)
+	if(!wielded)
+		return BLOCK_NONE
+	return ..()