bgpd: Add route count from neighbours & established sessions to bgp summary

* bgp_vty.c: (bgp_show_summary) The sum of the routes received from
  each neighbour can be interesting/useful.  Add a line with this to
  end of 'show ...  bgp ...  summary'. Also, add a count of the number of
  established sessions.

  Note, the route count is also available from 'show bgp <afi> <safi>
  statistics', along with more.
1 file changed