netfilter: ipt_CLUSTERIP: create proc entry under proper ipt_CLUSTERIP directory

Create proc entries under the ipt_CLUSTERIP directory of proper
net namespace.

Signed-off-by: Gao feng <[e-mail]>
Signed-off-by: Pablo Neira Ayuso <[e-mail]>

net/ipv4/netfilter/ipt_CLUSTERIP.c

···
 			struct net_device *dev)
 {
 	struct clusterip_config *c;
-	struct clusterip_net *cn = net_generic(&init_net, clusterip_net_id);
+	struct clusterip_net *cn = net_generic(dev_net(dev), clusterip_net_id);
 
 	c = kzalloc(sizeof(*c), GFP_ATOMIC);
 	if (!c)