usage.c: remove reference to busybox.h
*: s/include "busybox.h"/include "libbb.h"

diff --git a/ipsvd/tcpudp.c b/ipsvd/tcpudp.c
index 553fee8..bc3d3a2 100644
--- a/ipsvd/tcpudp.c
+++ b/ipsvd/tcpudp.c
@@ -32,7 +32,7 @@
 #include <limits.h>
 #include <linux/netfilter_ipv4.h> /* wants <limits.h> */
 
-#include "busybox.h"
+#include "libbb.h"
 #include "ipsvd_perhost.h"
 
 #ifdef SSLSVD