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:         75207 imported, 0 exported, 75207 preferred
  Route change stats:     received   rejected   filtered    ignored   accepted
    Import updates:        7870064          0          0     783599    7086465
    Import withdraws:      3602193          0        ---       9294    3592899
    Export updates:        7086465    7086465          0        ---          0
    Export withdraws:      3592899        ---        ---        ---          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:       218/240
    Keepalive timer:  30/80