gw3/ipv4: show protocols all p_maintbl

p_maintbl Pipe master up 2017-08-30 => ebgp

Preference:     70
  Input filter:   (unnamed)
  Output filter:  REJECT
  Routes:         7052 imported, 0 exported
  Route change stats:     received   rejected   filtered    ignored   accepted
    Import updates:        3879836          0        100        919    3878817
    Import withdraws:      1496260          0        ---          0    1496179
    Export updates:        3878917    3878817        100          0          0
    Export withdraws:      1496260          0        ---         81          0