Correctly ignore old servers in the db

lib/util.js

@@ -36,6 +36,16 @@ function getServerNameByIp(ip) {
 	}
 }
 
+function getServerIps() {
+	var ips = [];
+
+	for (var i = 0; i < servers.length; i++) {
+		ips.push(servers[i].ip);
+	}
+
+	return ips;
+}
+
 // This method is a monstrosity.
 // Since we loaded ALL pings from the database, we need to filter out the pings so each entry is a minute apart.
 // This is done by iterating over the list, since the time between each ping can be completely arbitrary.
@@ -120,11 +130,16 @@ exports.setIntervalNoDelay = function(func, delay) {
 };
 
 exports.convertPingsToGraph = function(sqlData) {
+	var serverIps = getServerIps();
 	var graphData = {};
 
 	for (var i = 0; i < sqlData.length; i++) {
 		var entry = sqlData[i];
 
+		if (serverIps.indexOf(entry.ip) === -1) {
+			continue;
+		}
+
 		var name = getServerNameByIp(entry.ip);
 
 		if (!name) {