ipv4: Namespaceify tcp_fin_timeout sysctl knob

Signed-off-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index 0802303..de5ff43 100644
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -105,6 +105,7 @@
 	int sysctl_tcp_retries1;
 	int sysctl_tcp_retries2;
 	int sysctl_tcp_orphan_retries;
+	int sysctl_tcp_fin_timeout;
 
 	struct ping_group_range ping_group_range;