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

diff --git a/debianutils/mktemp.c b/debianutils/mktemp.c
index ce5bda5..966257a 100644
--- a/debianutils/mktemp.c
+++ b/debianutils/mktemp.c
@@ -9,7 +9,7 @@
  * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
  */
 
-#include "busybox.h"
+#include "libbb.h"
 #include <stdio.h>
 #include <errno.h>
 #include <string.h>
diff --git a/debianutils/pipe_progress.c b/debianutils/pipe_progress.c
index 51a017c..f950084 100644
--- a/debianutils/pipe_progress.c
+++ b/debianutils/pipe_progress.c
@@ -7,7 +7,7 @@
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
-#include "busybox.h"
+#include "libbb.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
diff --git a/debianutils/readlink.c b/debianutils/readlink.c
index 1a2c1ef..b6b4965 100644
--- a/debianutils/readlink.c
+++ b/debianutils/readlink.c
@@ -7,12 +7,10 @@
  * Licensed under GPL v2 or later, see file LICENSE in this tarball for details.
  */
 
-#include "busybox.h"
-#include <errno.h>
-#include <unistd.h>
-#include <stdlib.h>
 #include <getopt.h>
 
+#include "libbb.h"
+
 int readlink_main(int argc, char **argv);
 int readlink_main(int argc, char **argv)
 {
diff --git a/debianutils/run_parts.c b/debianutils/run_parts.c
index e6dec04..cb4a4e4 100644
--- a/debianutils/run_parts.c
+++ b/debianutils/run_parts.c
@@ -30,10 +30,10 @@
  * -u MASK		umask. Set the umask of the program executed to MASK.
  */
 
-
-#include "busybox.h"
 #include <getopt.h>
 
+#include "libbb.h"
+
 #if ENABLE_FEATURE_RUN_PARTS_LONG_OPTIONS
 static const struct option runparts_long_options[] = {
 	{ "arg",        1,      NULL,   'a' },
diff --git a/debianutils/start_stop_daemon.c b/debianutils/start_stop_daemon.c
index 1154794..0681a08 100644
--- a/debianutils/start_stop_daemon.c
+++ b/debianutils/start_stop_daemon.c
@@ -8,10 +8,11 @@
  * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
  */
 
-#include "busybox.h"
 #include <getopt.h>
 #include <sys/resource.h>
 
+#include "libbb.h"
+
 static int signal_nr = 15;
 static int user_id = -1;
 static char *userspec;
diff --git a/debianutils/which.c b/debianutils/which.c
index 02992d0..2c71ed3 100644
--- a/debianutils/which.c
+++ b/debianutils/which.c
@@ -10,7 +10,7 @@
  * Based on which from debianutils
  */
 
-#include "busybox.h"
+#include "libbb.h"
 
 int which_main(int argc, char **argv);
 int which_main(int argc, char **argv)