Fix things so `mkdir -p' can create very deep directories, e.g.,

mkdir -p $(perl -e 'print "a/" x 40000') now works.

(main): For --parents (-p), call make_path with the
entire directory name, so we don't ever require that file operations
like stat or chmod be performed on the entire command line argument.

src/mkdir.c

@@ -149,13 +149,11 @@ main (int argc, char **argv)
 
       if (create_parents)
 	{
-	  char *parents = dir_name (argv[optind]);
-	  fail = make_path (parents, parent_mode, parent_mode,
+	  char *dir = argv[optind];
+	  fail = make_path (dir, newmode, parent_mode,
 			    -1, -1, 1, verbose_fmt_string);
-	  free (parents);
 	}
-
-      if (fail == 0)
+      else
 	{
 	  const char *dir = argv[optind];
 	  int dir_created;