This patch updates the network emulation packet scheduler.
	* name changed from delay to netem since it does more than just delay
	* Catalin's merged code to do packet reordering
	* uses a socket queue's directly rather than layering on qdisc(fifo)
	  because this is used in performance tests.
	* adds placeholder in API for future enhancements (rate and duplicate).
Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@redhat.com>