ipv4: namespacify ip fragment max dist sysctl knob

Signed-off-by: Nikolay Borisov <kernel@kyup.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/inet_frag.h b/include/net/inet_frag.h
index 12aac0f..909972a 100644
--- a/include/net/inet_frag.h
+++ b/include/net/inet_frag.h
@@ -13,6 +13,7 @@
 	int			timeout;
 	int			high_thresh;
 	int			low_thresh;
+	int			max_dist;
 };
 
 /**