msk-rs2/ipv4: show protocols all liner

liner BGP --- start 2020-06-17 Passive

Description:    liner/42765/AS-LINER
  BGP state:          Passive
    Neighbor address: 185.1.160.228
    Neighbor AS:      42765
    Local AS:         49869
  Channel ipv4
    State:          DOWN
    Table:          master4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   5000
      Action:       disable