add route to sync dns records

merge the mail dns route with this one as well

fixes #737

src/taskworker.js

@@ -7,6 +7,7 @@ var apptask = require('./apptask.js'),
     backups = require('./backups.js'),
     cloudron = require('./cloudron.js'),
     database = require('./database.js'),
+    domains = require('./domains.js'),
     externalLdap = require('./externalldap.js'),
     fs = require('fs'),
     mail = require('./mail.js'),
@@ -25,6 +26,7 @@ const TASKS = { // indexed by task type
     cleanBackups: backups.cleanup,
     syncExternalLdap: externalLdap.sync,
     changeMailLocation: mail.changeLocation,
+    syncDnsRecords: domains.syncDnsRecords,
 
     _identity: (arg, progressCallback, callback) => callback(null, arg),
     _error: (arg, progressCallback, callback) => callback(new Error(`Failed for arg: ${arg}`)),