diff -r e9090966c803 -r d54011a23b20 core/moduleapi.lua
--- a/core/moduleapi.lua	Sat Apr 27 13:11:03 2013 +0100
+++ b/core/moduleapi.lua	Sat Apr 27 14:57:24 2013 +0100
@@ -270,6 +270,10 @@
 	return set.new(value);
 end
 
+function api:context(host)
+	return setmetatable({host=host or "*"}, {__index=self,__newindex=self});
+end
+
 function api:add_item(key, value)
 	self.items = self.items or {};
 	self.items[key] = self.items[key] or {};