msk-rs2/ipv4: show protocols all gfn

gfn BGP --- start 2020-10-14 Passive

Description:    gfn/50899/AS50899
  BGP state:          Passive
    Neighbor address: 185.1.161.29
    Neighbor AS:      50899
    Local AS:         49869
  Channel ipv4
    State:          DOWN
    Table:          master4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   5000
      Action:       disable