Comment 0 for bug 1486829

After neutron client supports extension, we had better indicate the command extension source.
for example:
$ neutron -h
....
  fox-sockets-create [fox_sockets]
  fox-sockets-delete [fox_sockets]
  fox-sockets-list [fox_sockets] Socket extsion list command.
  fox-sockets-show [fox_sockets]
  fox-sockets-update [fox_sockets]
...