todo

模仿cisco路由器

Things to do
------------

	* Medium priority
	- Documetation. Need help...

	* Future version (after 1.0)
	- Modular (dlopen()) packet capture (pcap, iptables/ulog, etc.) and
	  flow export (NetFlow, file, etc.) API
	- One process and common memory for all, separate capture thread
	  for each interface.
	- More perfomance: store flows in balanced trees.
	- More NetFlow fields support (AS, etc.).
	- NetFlow v9?