rix-rs2/ipv4: show protocols all levelmsk

levelmsk BGP --- start 2021-01-19 Passive

Description:    levelmsk/52091/AS-LEVEL-MSK
  BGP state:          Passive
    Neighbor address: 193.27.39.84
    Neighbor AS:      52091
    Local AS:         49634
  Channel ipv4
    State:          DOWN
    Table:          master4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   5000
      Action:       disable