Implement AA timers reset on death

This is a field in the packet, live only uses this for Lay on Hands

Currently I didn't add this to the packet since it has 0 effect on the
client.

We could move this field to aa_ranks which would give more flexibility
for custom servers, but no one said they wanted it there.

zone/aa_ability.h

@@ -50,6 +50,7 @@ public:
 	int drakkin_heritage;
 	int status;
 	bool grant_only;
+	bool reset_on_death;
 	int type;
 	int charges;
 	int first_rank_id;