Replace all secondary flags with bitflags stored in the flags_2 var

code/modules/mining/equipment/mining_tools.dm

@@ -3,7 +3,7 @@
 	name = "pickaxe"
 	icon = 'icons/obj/mining.dmi'
 	icon_state = "pickaxe"
-	flags = CONDUCT
+	flags_1 = CONDUCT_1
 	slot_flags = SLOT_BELT | SLOT_BACK
 	force = 15
 	throwforce = 10
@@ -93,7 +93,7 @@
 	icon_state = "shovel"
 	lefthand_file = 'icons/mob/inhands/equipment/mining_lefthand.dmi'
 	righthand_file = 'icons/mob/inhands/equipment/mining_righthand.dmi'
-	flags = CONDUCT
+	flags_1 = CONDUCT_1
 	slot_flags = SLOT_BELT
 	force = 8
 	var/digspeed = 20