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).

module:set_global();

local function sink_maker(config)
	local levels = {
		debug = module:measure("log.debug", "rate");
		info = module:measure("log.info", "rate");
		warn = module:measure("log.warn", "rate");
		error = module:measure("log.error", "rate");
	};
	return function (_, level)
		return levels[level]();
	end
end

require"core.loggingmanager".register_sink_type("measure", sink_maker);