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:         58388 imported, 0 exported, 58388 preferred
  Route change stats:     received   rejected   filtered    ignored   accepted
    Import updates:        1368605          0          0      34085    1334520
    Import withdraws:       611329          0        ---        338     610991
    Export updates:        1334520    1334520          0        ---          0
    Export withdraws:       610991        ---        ---        ---          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:       171/240
    Keepalive timer:  47/80