virtono: show protocols all sys_kernel_v4

Name       Proto      Table      State  Since         Info
sys_kernel_v4 Kernel     master4    up     2020-06-01 00:24:22  
Channel ipv4
State:          UP
Table:          master4
Preference:     10
Input filter:   ACCEPT
Output filter:  (unnamed)
Routes:         6 imported, 506 exported, 1 preferred
Route change stats:     received   rejected   filtered    ignored   accepted
Import updates:              6          0          0          0          6
Import withdraws:            0          0        ---          0          0
Export updates:         441673         32       1851        ---     439790
Export withdraws:         3902        ---        ---        ---       3903