msk-rs2/ipv4: show protocols all cstnet

cstnet BGP --- start 2020-10-14 Passive

Description:    cstnet/62429/AS-CSTNET
  BGP state:          Passive
    Neighbor address: 185.1.161.30
    Neighbor AS:      62429
    Local AS:         49869
  Channel ipv4
    State:          DOWN
    Table:          master4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   5000
      Action:       disable