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.

---
labels:
summary: Report server uptime in presence
...

Introduction
============

This module simply responds to a presence probe sent to the server with
a presence staza containing a timestamp from when the server started.

This is imagined as an alternative to the XEP-0012 "Last Activity"
protocol that can seem a bit overloaded.