Field type for forgottenpasswordurl in tool_mobile_get_public_config WS is incorrect

Before the patch

1. Login as admin.
2. Navigate to Site administration / Plugins / Authentication / Manage authentication
3. Set the "Forgotten password URL" setttig to a non-http/https URL. For example:

   mailto:someone@example.com

4. Save the changes

After the patch

Master only

1. Purge caches
2. Navigate to admin/index.php.
   • Confirm that you see a warning indicating that the forgotten password URL is invalid.
3. Click on the Check button
   • Confirm that you are redirected to the "Manage authentication" admin page.
4. With the "Forgotten password URL" setttig still set to an invalid URL, click "Save changes".
   • Confirm that you get a validation error indicating that the forgotten password URL is invalid.
5. Now, enter a valid http/https URL for the forgotten password URL. (Or just set it to empty)
6. Click "Save changes"
   • Confirm that the changes are successfully saved.
7. Navigate to admin/index.php.
   • Confirm that you don't see the warning about the invalid forgotten password URL.

Master, 33 and 32

1. As admin, enable "Mobile services": Site administration ► Mobile app ► Mobile settings
2. Navigate to Site administration / Plugins / Authentication / Manage authentication
3. Set the "Forgotten password URL" setttig to a non-http/https URL. For example:

   mailto:someone@example.com

   
   Note: On master, you'll have to manually update the mdl_config table in the database directly to go over the form validation:

   UPDATE mdl_config SET value = 'mailto:someone@example.com' WHERE name = 'forgottenpasswordurl'

4. Try to access to the site using the mobile app
   • Confirm that you can still log-in even if the "forgottenpasswordurl" setting is not correct