dynamicdns: Update URLs to the new dynamic DNS server

By December 15th, all freedomboxes should no longer be pointing to the old
server. Hence, we need to have these changes done much before the migration date
for the changes to propagate.

The new website ddns.freedombox.org does not allow registrations yet. However,
the new website has a link to announcement. There is now an advice for new users
seeking to create accounts during the migration period.

Tests:

- In Dynamic DNS app, in the about page, the link is to the new server and it
works.

- The example link in the configuration form, IP URL field description is to new
server and it works.

- Functional tests for the Dynamic DNS app work.

Signed-off-by: Sunil Mohan Adapa <sunil@medhas.org>
Reviewed-by: James Valleroy <jvalleroy@mailbox.org>

plinth/modules/dynamicdns/forms.py

@@ -56,7 +56,7 @@ class ConfigureForm(forms.Form):
                      'router) this URL is used to determine the real '
                      'IP address. The URL should simply return the IP where '
                      'the client comes from (example: '
-                     'http://myip.datasystems24.de).'),
+                     'https://ddns.freedombox.org/ip/).'),
         box_name=gettext_lazy(cfg.box_name))
     help_user = \
         gettext_lazy('The username that was used when the account was '

plinth/modules/dynamicdns/templates/dynamicdns.html

@@ -11,8 +11,8 @@
   <p>
     {% blocktrans trimmed %}
       If you are looking for a free dynamic DNS account, you may find
-      a free GnuDIP service at <a href='http://gnudip.datasystems24.net'
-      target='_blank'>gnudip.datasystems24.net</a> or you may find
+      a free GnuDIP service at <a href='https://ddns.freedombox.org'
+      target='_blank'>ddns.freedombox.org</a> or you may find
       free update URL based services at
       <a href='http://freedns.afraid.org/' target='_blank'>
       freedns.afraid.org</a>.

plinth/modules/dynamicdns/tests/test_functional.py

@@ -6,6 +6,7 @@ Functional, browser based tests for dynamicdns app.
 import time
 
 import pytest
+
 from plinth.tests import functional
 
 pytestmark = [
@@ -55,7 +56,7 @@ def _configure(browser):
     browser.find_by_id('id_dynamicdns_user').fill('tester')
     browser.find_by_id('id_dynamicdns_secret').fill('testingtesting')
     browser.find_by_id('id_dynamicdns_ipurl').fill(
-        'http://myip.datasystems24.de')
+        'https://ddns.freedombox.org/ip/')
     functional.submit(browser)
 
     # After a domain name change, Let's Encrypt will restart the web
@@ -76,7 +77,7 @@ def _has_original_config(browser):
     ipurl = browser.find_by_id('id_dynamicdns_ipurl').value
     if enabled and service_type == 'GnuDIP' and server == 'example.com' \
        and domain == 'freedombox.example.com' and user == 'tester' \
-       and ipurl == 'http://myip.datasystems24.de':
+       and ipurl == 'https://ddns.freedombox.org/ip/':
         return True
     else:
         return False
@@ -93,7 +94,7 @@ def _change_config(browser):
     browser.find_by_id('id_dynamicdns_user').fill('tester2')
     browser.find_by_id('id_dynamicdns_secret').fill('testingtesting2')
     browser.find_by_id('id_dynamicdns_ipurl').fill(
-        'http://myip2.datasystems24.de')
+        'https://ddns2.freedombox.org/ip/')
     functional.submit(browser)
 
     # After a domain name change, Let's Encrypt will restart the web