vlib: add 'show node' and 'set node function' CLI

Change-Id: I084d7c9e34329f10b5fe45e0b157c4defe0f2811
Signed-off-by: Damjan Marion <damarion@cisco.com>
diff --git a/src/vlib/node.c b/src/vlib/node.c
index 805c69e..ed474eb 100644
--- a/src/vlib/node.c
+++ b/src/vlib/node.c
@@ -349,6 +349,7 @@
   n = clib_mem_alloc_no_fail (sizeof (n[0]));
   memset (n, 0, sizeof (n[0]));
   n->index = vec_len (nm->nodes);
+  n->node_fn_registrations = r->node_fn_registrations;
 
   vec_add1 (nm->nodes, n);