mod_s2s_keepalive: Ignore errors from the local server If a stanza can't be delivered and instead an bounce is generated, the origin of the error, when different from the stanza 'from' should be indicated in the 'by' attribute of the <error>, which we look for here so this doesn't count as a successful ping. An error that does come from the remote means we have connectivity, but probably no XEP-0199 handling. This is fine. We care about connectivity, not protocol.

---
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.