tools: rlite-ctl: add dif-rib-show command
tools: rlite-ctl: add dif-rib-show command

This is just the same as ipcp-rib-show, but it is handy because DIF
names are often shorter and simpler than IPCP names.

autrimpo/rlite,autrimpo/rlite,autrimpo/rlite,vmaffione/rlite,vmaffione/rlite,vmaffione/rlite,vmaffione/rlite,autrimpo/rlite