merge domaindb.js into domains.js

src/taskworker.js

@@ -8,7 +8,7 @@ const apptask = require('./apptask.js'),
     backuptask = require('./backuptask.js'),
     cloudron = require('./cloudron.js'),
     database = require('./database.js'),
-    domains = require('./domains.js'),
+    dns = require('./dns.js'),
     externalLdap = require('./externalldap.js'),
     fs = require('fs'),
     mail = require('./mail.js'),
@@ -27,7 +27,7 @@ const TASKS = { // indexed by task type
     cleanBackups: backupCleaner.run,
     syncExternalLdap: externalLdap.sync,
     changeMailLocation: mail.changeLocation,
-    syncDnsRecords: domains.syncDnsRecords,
+    syncDnsRecords: dns.syncDnsRecords,
 
     _identity: (arg, progressCallback, callback) => callback(null, arg),
     _error: (arg, progressCallback, callback) => callback(new Error(`Failed for arg: ${arg}`)),