Fixed world breakage due to missing include of <sys/cdefs.h> in previous

commit.

Fixed related style bugs:
basename.c: misplaced '#if 0'
dirname.c: misplaced '#if 0'
getgrent.c: missing '#if 0', and tab lossage in vendor id (the previous
            commit fixed the complete corruption of the vendor id but
	    lost a tab)
getpwent.c: missing '#if 0'

lib/libc/gen/basename.c

@@ -25,11 +25,13 @@
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef lint
 #if 0
+#ifndef lint
 static char rcsid[] = "$OpenBSD: basename.c,v 1.4 1999/05/30 17:10:30 espie Exp $";
-#endif
 #endif /* not lint */
+#endif
+
+#include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
 #include <errno.h>

lib/libc/gen/dirname.c

@@ -25,11 +25,13 @@
  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef lint
 #if 0
+#ifndef lint
 static char rcsid[] = "$OpenBSD: dirname.c,v 1.4 1999/05/30 17:10:30 espie Exp $";
-#endif
 #endif /* not lint */
+#endif
+
+#include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
 #include <errno.h>

lib/libc/gen/getgrent.c

@@ -33,9 +33,13 @@
  * SUCH DAMAGE.
  */
 
+#if 0
 #if defined(LIBC_SCCS) && !defined(lint)
-static char sccsid[] = "@(#)getgrent.c 8.2 (Berkeley) 3/21/94";
+static char sccsid[] = "@(#)getgrent.c	8.2 (Berkeley) 3/21/94";
 #endif /* LIBC_SCCS and not lint */
+#endif
+
+#include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
 #include <sys/types.h>

lib/libc/gen/getpwent.c

@@ -34,9 +34,13 @@
  * SUCH DAMAGE.
  */
 
+#if 0
 #if defined(LIBC_SCCS) && !defined(lint)
 static char sccsid[] = "@(#)getpwent.c	8.2 (Berkeley) 4/27/95";
 #endif /* LIBC_SCCS and not lint */
+#endif
+
+#include <sys/cdefs.h>
 __FBSDID("$FreeBSD$");
 
 #include "un-namespace.h"