br2/ipv4: show protocols all pipe1

pipe1 Pipe --- up 2020/02/20-07:59:01 master4 <=> blackholed

Channel main
    Table:          master4
    Peer table:     blackholed
    Import state:   up
    Export state:   up
    Import filter:  ACCEPT
    Export filter:  REJECT
  Routes:         1 imported, 0 exported
  Route change stats:     received   rejected   filtered    ignored   accepted
    Import updates:              3          0          0          0          3
    Import withdraws:            1          0        ---          0          1
    Export updates:      140072880          4  140072876          0          0
    Export withdraws:     26899738          0        ---   27261571          0