Relax mod_component host check to allow node@host components

gistfile1.diff

diff -r c0ee152400ff plugins/mod_component.lua
--- a/plugins/mod_component.lua	Sun Mar 09 23:48:32 2014 +0100
+++ b/plugins/mod_component.lua	Tue Mar 11 14:30:49 2014 -0400
@@ -197,8 +197,8 @@
 		local from = stanza.attr.from;
 		if from then
 			if session.component_validate_from then
-				local _, domain = jid_split(stanza.attr.from);
-				if domain ~= session.host then
+				local node, domain = jid_split(stanza.attr.from);
+				if domain ~= session.host and (node and node.."@"..domain or domain) ~= session.host then
 					-- Return error
 					session.log("warn", "Component sent stanza with missing or invalid 'from' address");
 					session:close{