From: Mathieu Trudel-Lapierre <mathieu.trudel-lapierre@canonical.com>
Subject: Don't include net/if.h, linux/if.h gets pulled in by netlink headers.

Index: netcf/src/dutil_linux.c
===================================================================
--- netcf.orig/src/dutil_linux.c	2011-12-20 22:50:54.847852000 -0500
+++ netcf/src/dutil_linux.c	2011-12-20 23:17:49.381333498 -0500
@@ -54,7 +54,6 @@
 #include "dutil.h"
 #include "dutil_linux.h"
 
-#include <net/if.h>
 #include <netlink/socket.h>
 #include <netlink/cache.h>
 #include <netlink/route/addr.h>