mod_lastactivity, mod_legacyauth, mod_presence, mod_saslauth, mod_tls: Use the newer stanza:get_child APIs and optimize away some table lookups

author: Kim Alvefur <zash@zash.se>
date: Fri, 04 Jul 2014 22:52:34 +0200
parent: 5758:ebc074918173
child: 7951:2b91da49285a
--- a/plugins/adhoc/adhoc.lib.lua	Fri Jul 04 21:48:25 2014 +0200
+++ b/plugins/adhoc/adhoc.lib.lua	Fri Jul 04 22:52:34 2014 +0200
@@ -25,12 +25,13 @@
 end
 
 function _M.handle_cmd(command, origin, stanza)
-	local sessionid = stanza.tags[1].attr.sessionid or uuid.generate();
+	local cmdtag = stanza.tags[1]
+	local sessionid = cmdtag.attr.sessionid or uuid.generate();
 	local dataIn = {};
 	dataIn.to = stanza.attr.to;
 	dataIn.from = stanza.attr.from;
-	dataIn.action = stanza.tags[1].attr.action or "execute";
-	dataIn.form = stanza.tags[1]:child_with_ns("jabber:x:data");
+	dataIn.action = cmdtag.attr.action or "execute";
+	dataIn.form = cmdtag:get_child("x", "jabber:x:data");
 
 	local data, state = command:handler(dataIn, states[sessionid]);
 	states[sessionid] = state;