[NET]: Set NLM_F_MULTI for neighbour rtnetlink messages to userspace.

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/core/neighbour.c

@@ -1556,6 +1556,7 @@ static int neigh_fill_info(struct sk_buff *skb, struct neighbour *n,
 					 sizeof(struct ndmsg));
 	struct ndmsg *ndm = NLMSG_DATA(nlh);
 
+	nlh->nlmsg_flags = pid ? NLM_F_MULTI : 0;
 	ndm->ndm_family	 = n->ops->family;
 	ndm->ndm_flags	 = n->flags;
 	ndm->ndm_type	 = n->type;