Update notes

doc/todo/VFALCO_TODO.txt

@@ -20,6 +20,9 @@ David Features:
 
 --------------------------------------------------------------------------------
 
+- Change ProxyInfo to use IPAddress, get rid of IPv4Address from the parsing
+  code
+
 - Validators should delay the application of newly downloaded lists from
   sources, to mitigate the effects of attacks. Unless there's no validators
   in the list.