iproute: fix handling of "dev IFACE" selector

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/networking/libiproute/libnetlink.c b/networking/libiproute/libnetlink.c
index 7291ee2..547013f 100644
--- a/networking/libiproute/libnetlink.c
+++ b/networking/libiproute/libnetlink.c
@@ -55,6 +55,7 @@
 	return rtnl_send(rth, (void*)&req, sizeof(req));
 }
 
+//TODO: pass rth->fd instead of full rth?
 int FAST_FUNC rtnl_send(struct rtnl_handle *rth, char *buf, int len)
 {
 	struct sockaddr_nl nladdr;