gw4/ipv4: show protocols all p_maintbl

p_maintbl Pipe master up 2017-09-20 => ebgp

Preference:     70
  Input filter:   (unnamed)
  Output filter:  REJECT
  Routes:         1494 imported, 0 exported
  Route change stats:     received   rejected   filtered    ignored   accepted
    Import updates:         115449          0         41          0     115408
    Import withdraws:        97277          0        ---          0      97277
    Export updates:         115408     115408          0          0          0
    Export withdraws:        97277          0        ---          0          0