Multiple Borers in a Single Body (#9066)

* Adds the ability for multiple borers in the same host. Adds upgrade paths for chest and leg borers.

* Fully implements the ability to have multiple borers in a single body, complete with unique chems, verbs, and genetic unlocks.

* Fixes to do with movement_speed_modifier, and some conflict resolution.

* Fixes some paths.

* Fixes conflicts.

* Fixes more conflicts.

* Inorganic limbs can no longer be infested. Removes arm borers' ability to produce creatine.

* Removes all mention of the term "cortical" from borers.

code/modules/projectiles/gun.dm

@@ -251,11 +251,13 @@
 
 /obj/item/weapon/gun/proc/click_empty(mob/user = null)
 	if (user)
-		user.visible_message("*click click*", "<span class='danger'>*click*</span>")
-		playsound(user, empty_sound, 100, 1)
+		if(empty_sound)
+			user.visible_message("*click click*", "<span class='danger'>*click*</span>")
+			playsound(user, empty_sound, 100, 1)
 	else
-		src.visible_message("*click click*")
-		playsound(get_turf(src), empty_sound, 100, 1)
+		if(empty_sound)
+			src.visible_message("*click click*")
+			playsound(get_turf(src), empty_sound, 100, 1)
 
 /obj/item/weapon/gun/attack(mob/living/M as mob, mob/living/user as mob, def_zone)
 	//Suicide handling.

code/modules/projectiles/guns/hookshot.dm

@@ -37,9 +37,14 @@
 /obj/item/weapon/gun/hookshot/New()
 	..()
 	for(var/i = 0;i <= maxlength; i++)
-		var/obj/effect/overlay/hookchain/HC = new(src)
-		HC.shot_from = src
-		links["[i]"] = HC
+		if(istype(src, /obj/item/weapon/gun/hookshot/flesh))
+			var/obj/effect/overlay/hookchain/flesh/HC = new(src)
+			HC.shot_from = src
+			links["[i]"] = HC
+		else
+			var/obj/effect/overlay/hookchain/HC = new(src)
+			HC.shot_from = src
+			links["[i]"] = HC
 
 /obj/item/weapon/gun/hookshot/Destroy()//if a single link of the chain is destroyed, the rest of the chain is instantly destroyed as well.
 	if(chain_datum)
@@ -232,11 +237,11 @@
 	undergoing_deletion = 1
 	if(extremity_A)
 		if(snap)
-			extremity_A.visible_message("The chain snaps and let go of \the [extremity_A]")
+			extremity_A.visible_message("The chain snaps and lets go of \the [extremity_A].")
 		extremity_A.tether = null
 	if(extremity_B)
 		if(snap)
-			extremity_B.visible_message("The chain snaps and let go of \the [extremity_B]")
+			extremity_B.visible_message("The chain snaps and lets go of \the [extremity_B].")
 		extremity_B.tether = null
 	for(var/i = 1; i<= links.len ;i++)
 		var/obj/effect/overlay/chain/C = links["[i]"]

code/modules/projectiles/guns/projectile/constructable/hivehand.dm

@@ -19,6 +19,7 @@
 	sharpness = 1
 	hitsound = "sound/weapons/bloodyslice.ogg"
 	attack_verb = list("claws", "rends", "slashes")
+	mech_flags = MECH_SCAN_ILLEGAL
 	conventional_firearm = 0
 	var/shots_remaining = 0
 	var/has_shot = 0

code/modules/projectiles/projectile/hookshot.dm

@@ -70,8 +70,9 @@
 		sleep(sleeptime)
 
 /obj/item/projectile/hookshot/bullet_die()
-	var/obj/item/weapon/gun/hookshot/hookshot = shot_from
-	hookshot.hook = null
+	if(shot_from)
+		var/obj/item/weapon/gun/hookshot/hookshot = shot_from
+		hookshot.hook = null
 	spawn()
 		OnDeath()
 		returnToPool(src)