mod_report_affiliations: Fix traceback a non-user is sending a presence For now we won’t touch their presence instead of emiting this traceback: error Traceback[s2s]: /usr/lib/prosody/core/rostermanager.lua:275: attempt to concatenate a nil value (local 'username') stack traceback: /usr/lib/prosody/core/rostermanager.lua:275: in function 'prosody.core.rostermanager.is_user_subscribed' ...ules/mod_report_affiliations/mod_report_affiliations.lua:116: in field '?' /usr/lib/prosody/util/events.lua:81: in function </usr/lib/prosody/util/events.lua:77> (...tail calls...) /usr/lib/prosody/core/stanza_router.lua:184: in upvalue 'core_post_stanza' /usr/lib/prosody/modules/mod_presence.lua:244: in function </usr/lib/prosody/modules/mod_presence.lua:231> (...tail calls...) /usr/lib/prosody/util/events.lua:81: in function </usr/lib/prosody/util/events.lua:77> (...tail calls...) /usr/lib/prosody/core/stanza_router.lua:188: in upvalue 'core_post_stanza' /usr/lib/prosody/core/stanza_router.lua:128: in upvalue 'core_process_stanza' /usr/lib/prosody/modules/mod_s2s.lua:818: in upvalue 'func' /usr/lib/prosody/util/async.lua:149: in function </usr/lib/prosody/util/async.lua:147>

# About

This module allows using the [mod_csi_simple][doc:modules:mod_csi_simple]
setting `csi_important_payloads` (added in trunk/0.12) in Prosody 0.11.x.

# Config

```
modules_enabled = {
    -- other modules etc
    "csi_simple",
    "csi_simple_compat",
}

csi_important_payloads = {
    -- Anything in this namespace:
    "{urn:example:important-namespace}",
    -- Specific element name and namespace:
    "{urn:example:xmpp:priority}super-important",
}
```

# Example

``` lua
csi_important_payloads = {
    -- XEP-0353: Jingle Message Initiation
    "{urn:xmpp:jingle-message:0}",
}
```