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.

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

This module turns Prosody hosts into components of other XMPP servers.

Configuration
=============

Example configuration:

``` {.lua}
VirtualHost "component.example.com"
modules_enabled = { "component_client" }
component_client = {
    host = "localhost";
    port = 5347;
    secret = "hunter2";
}
```