usage.c: remove reference to busybox.h

*: s/include "busybox.h"/include "libbb.h"

editors/awk.c

@@ -7,7 +7,7 @@
  * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
  */
 
-#include "busybox.h"
+#include "libbb.h"
 #include "xregex.h"
 #include <math.h>
 extern char **environ;

editors/ed.c

@@ -7,7 +7,7 @@
  * The "ed" built-in command (much simplified)
  */
 
-#include "busybox.h"
+#include "libbb.h"
 
 enum {
 	USERSIZE = sizeof(bb_common_bufsiz1) > 1024 ? 1024

editors/patch.c

@@ -20,10 +20,8 @@
  */
 
 #include <getopt.h>
-#include <string.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include "busybox.h"
+
+#include "libbb.h"
 
 static unsigned int copy_lines(FILE *src_stream, FILE *dest_stream, const unsigned int lines_count)
 {

editors/sed.c

@@ -58,7 +58,7 @@
 	Reference http://www.opengroup.org/onlinepubs/007904975/utilities/sed.html
 */
 
-#include "busybox.h"
+#include "libbb.h"
 #include "xregex.h"
 
 /* Each sed command turns into one of these structures. */

editors/vi.c

@@ -21,7 +21,7 @@
  *	An "ex" line oriented mode- maybe using "cmdedit"
  */
 
-#include "busybox.h"
+#include "libbb.h"
 
 #define ENABLE_FEATURE_VI_CRASHME 0