mod_delegation: use clean_xmlns to remove jabber:client namespace from node: for the same reason as in mod_privilege, `jabber:client` namespace is removed with the clean_xmlns method coming from there. Furthermore, the forwarded <iq> stanza use the `jabber:client` xmlns while the stanza may come from a component with e.g. `jabber:component:accept` xmlns, this can lead to inconsistencies between the <iq> stanza and children (like <error> element).

---
labels:
- 'Stage-Stable'
summary: 'XEP-0279: Server IP Check'
...

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

Sometimes for various reasons a client might want to know its IP address
as it appears to the server. This [simple
XEP](http://xmpp.org/extensions/xep-0279.html) allows the client to ask
the server for the IP address it is connected from.

Compatibility
=============

  ----- -------
  0.7   Works
  0.6   Works
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