Split setting of dns records from mail config route

This allows us to enable email server but not setup the dns records
yet. Useful for importing existing mailboxes from another server
without adjusting the DNS.

src/routes/mail.js

@@ -7,6 +7,8 @@ exports = module.exports = {
     updateDomain: updateDomain,
     removeDomain: removeDomain,
 
+    setDnsRecords: setDnsRecords,
+
     getStatus: getStatus,
 
     setMailFromValidation: setMailFromValidation,
@@ -93,6 +95,18 @@ function updateDomain(req, res, next) {
     });
 }
 
+function setDnsRecords(req, res, next) {
+    assert.strictEqual(typeof req.body, 'object');
+    assert.strictEqual(typeof req.params.domain, 'string');
+
+    mail.setDnsRecords(req.params.domain, function (error) {
+        if (error && error.reason === MailError.NOT_FOUND) return next(new HttpError(404, error.message));
+        if (error) return next(new HttpError(500, error));
+
+        next(new HttpSuccess(201));
+    });
+}
+
 function removeDomain(req, res, next) {
     assert.strictEqual(typeof req.params.domain, 'string');