Readds borers (#1999)

Readds the cortical borers and also syndi-borers.
Syndi-borers now gives a response if you try to use it multiple times
too quickly, and also prevents usage more than once while it's still
waiting for ghost responses.

code/modules/mob/living/carbon/human/human.dm

@@ -84,6 +84,10 @@
 				stat("Tank Pressure", internal.air_contents.return_pressure())
 				stat("Distribution Pressure", internal.distribute_pressure)
 
+		var/mob/living/simple_animal/borer/B = has_brain_worms()
+		if(B && B.controlling)
+			stat("Chemicals", B.chemicals)
+
 		if(mind)
 			if(mind.changeling)
 				stat("Chemical Storage", "[mind.changeling.chem_charges]/[mind.changeling.chem_storage]")