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

diff --git a/networking/ftpgetput.c b/networking/ftpgetput.c
index 9b0510d..54b5f5a 100644
--- a/networking/ftpgetput.c
+++ b/networking/ftpgetput.c
@@ -13,8 +13,8 @@
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
-#include "busybox.h"
 #include <getopt.h>
+#include "libbb.h"
 
 typedef struct ftp_host_info_s {
 	const char *user;