Make each link list entry a single packet.
Make each link list entry a single packet.

Can actually do much tighter packing, but we will start here to see if it
makes a difference.
--BRJ

rmcgurrin/Qlab,rmcgurrin/Qlab,rmcgurrin/Qlab,Plourde-Research-Lab/Qlab,BBN-Q/Qlab,BBN-Q/Qlab,BBN-Q/Qlab,rmcgurrin/Qlab,Plourde-Research-Lab/Qlab,Plourde-Research-Lab/Qlab,BBN-Q/Qlab