netfilter: netns nf_conntrack: per-netns unconfirmed list

What is confirmed connection in one netns can very well be unconfirmed
in another one.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/include/net/netns/conntrack.h b/include/net/netns/conntrack.h
index e453a33..6ddf58e 100644
--- a/include/net/netns/conntrack.h
+++ b/include/net/netns/conntrack.h
@@ -1,6 +1,7 @@
 #ifndef __NETNS_CONNTRACK_H
 #define __NETNS_CONNTRACK_H
 
+#include <linux/list.h>
 #include <asm/atomic.h>
 
 struct netns_ct {
@@ -8,6 +9,7 @@
 	unsigned int		expect_count;
 	struct hlist_head	*hash;
 	struct hlist_head	*expect_hash;
+	struct hlist_head	unconfirmed;
 	int			hash_vmalloc;
 	int			expect_vmalloc;
 };