msk-rs2/ipv4: show protocols all DSSV

DSSV BGP --- start 2020-02-07 Passive BGP Error: Hold timer expired

Description:    DSSV/197140/AS-DSSV
  BGP state:          Passive
    Neighbor address: 31.44.187.123
    Neighbor AS:      197140
    Local AS:         50817
    Last error:       BGP Error: Hold timer expired
  Channel ipv4
    State:          DOWN
    Table:          master4
    Preference:     100
    Input filter:   (unnamed)
    Output filter:  (unnamed)
    Import limit:   5000
      Action:       disable