kernel/ed: Fix typo in a variable name.
systat - Add -netbw option

* Add a new option -netbw (or :netbw when running).  This option displays
  the aggregate and per-connection tcp receive and send data rate.

  Only active connections are shown, making it easy to pick out which
  connections are hogging the line.
systat - further enhance -netbw

* Print IPs in a more readable fashion
* A better IP:port sort order
* Better alignment
* Add interesting state and TCP flags
syslog - add rexmit to -netbw

* Add aggregate byte retransmission rate