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).

-- Compatibility with clients that set 'to' on resource bind requests
--
-- http://xmpp.org/rfcs/rfc3920.html#bind
-- http://xmpp.org/rfcs/rfc6120.html#bind-servergen-success

local st = require "util.stanza";

module:hook("iq/host/urn:ietf:params:xml:ns:xmpp-bind:bind", function(event)
	local fixed_stanza = st.clone(event.stanza);
	fixed_stanza.attr.to = nil;
	prosody.core_process_stanza(event.origin, fixed_stanza);
	return true;
end);