mod_bookmarks2: Fix handling of nick and password elements This form of child retrieval fails when the stanza elements internally don't have an 'xmlns' attribute, which can happen sometimes for some reason, including when they have been constructed via the stanza builder API. When that is the case then the explicit namespace arguemnt does not match the nil value of the internal attribute. Calling `:get_child()` without the namespace argument does the right thing here, with both nil and the parent namespace as valid values for the internal attribute.

---
summary: XMPP Compliance Suites 2021 self-test
rockspec:
  dependencies:
  - mod_cloud_notify
  - mod_smacks
  - mod_bookmarks
...

Compare the list of enabled modules with
[XEP-0443: XMPP Compliance Suites 2021] and produce basic report to the
Prosody log file.

If installed with the Prosody plugin installer (trunk/0.12+ required)
then all modules needed for a green checkmark should be included.