rename function to setupDnsAndCert

this way, we can reuse this logic for the mail domain as well

src/taskworker.js

@@ -5,8 +5,8 @@
 var apptask = require('./apptask.js'),
     async = require('async'),
     backups = require('./backups.js'),
+    cloudron = require('./cloudron.js'),
     database = require('./database.js'),
-    domains = require('./domains.js'),
     externalLdap = require('./externalldap.js'),
     fs = require('fs'),
     reverseProxy = require('./reverseproxy.js'),
@@ -20,7 +20,7 @@ const TASKS = { // indexed by task type
     backup: backups.backupBoxAndApps,
     update: updater.update,
     renewcerts: reverseProxy.renewCerts,
-    setupDashboardDnsAndCert: domains.setupDashboardDnsAndCert,
+    setupDnsAndCert: cloudron.setupDnsAndCert,
     cleanBackups: backups.cleanup,
     syncExternalLdap: externalLdap.sync,