Allow using vppctl with piped commands on stdin
Allow using vppctl with piped commands on stdin

milanlenco/vpp-1,rastislavszabo/vpp,milanlenco/vpp-1,rastislavszabo/vpp,brecode/vpp,milanlenco/vpp-1,rastislavszabo/vpp,milanlenco/vpp-1,brecode/vpp,rastislavszabo/vpp,rastislavszabo/vpp,rastislavszabo/vpp,brecode/vpp,rastislavszabo/vpp,milanlenco/vpp-1,brecode/vpp,brecode/vpp