ping: Reworked get request output for ip addresses

- Rewrote code
- Replaced missing addresses with empty addresses
- Added timestamps of last update

routes/ping.js

@@ -33,7 +33,12 @@ router.get("/:fqdn", (req, res) => {
     db.q.select(IP_TYPES).from("addresses").filter("fqdn", req.params.fqdn).first((e, d) => {
 		if (e) return res.status(400).send("Error");
 		if (!d) return res.status(404).send("Unknown FQDN");
-		res.send(d.ipv4 ? (d.ipv6 ? d.ipv4 + "\n" + d.ipv6 : d.ipv4) : (d.ipv6 ? d.ipv6 : ""));
+		res.send([
+		    d.ipv4 ? d.ipv4 : "0.0.0.0",
+		    d.ipv4LastPing
+		    d.ipv6 ? d.ipv6 : "::",
+		    d.ipv6LastPing
+		].reduce((a, b) => a + "\n" + b));
 	});
 });