vm-birdlg/ipv4: show protocols all rs2

rs2 BGP Trs2 up 2021-04-20 Established

Description:    session avec RR-l1
  Preference:     100
  Input filter:   ACCEPT
  Output filter:  REJECT
  Routes:         72505 imported, 0 exported, 72505 preferred
  Route change stats:     received   rejected   filtered    ignored   accepted
    Import updates:        4708243          0          0     466685    4241558
    Import withdraws:      2307636          0        ---       1886    2305750
    Export updates:        4241558    4241558          0        ---          0
    Export withdraws:      2305750        ---        ---        ---          0
  BGP state:          Established
    Neighbor address: 77.95.71.5
    Neighbor AS:      43100
    Neighbor ID:      77.95.71.5
    Neighbor caps:    refresh enhanced-refresh restart-aware AS4
    Session:          external AS4
    Source address:   77.95.71.15
    Hold timer:       222/240
    Keepalive timer:  66/80