Modified old pings cleanup config, ip as primary key in player records table

lib/app.js

@@ -23,7 +23,7 @@ class App {
     this.database.ensureIndexes(() => {
       this.database.loadGraphPoints(config.graphDuration, () => {
         this.database.loadRecords(() => {
-          if (config.deleteOldPings) {
+          if (config.oldPingsCleanup && config.oldPingsCleanup.enabled) {
             this.database.initOldPingsDelete(callback)
           } else {
             callback()