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

diff --git a/sysklogd/klogd.c b/sysklogd/klogd.c
index 6242539..5beec14 100644
--- a/sysklogd/klogd.c
+++ b/sysklogd/klogd.c
@@ -17,7 +17,7 @@
  * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
  */
 
-#include "busybox.h"
+#include "libbb.h"
 #include <sys/syslog.h>
 #include <sys/klog.h>