Add licence.

Complained about by:	juli

Correct usage() text.

usr.sbin/asf/asf.c

@@ -1,3 +1,28 @@
+/*
+ * Copyright (c) 2002, 2003 Greg Lehey
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * This software is provided by the author ``as is'' and any express
+ * or implied warranties, including, but not limited to, the implied
+ * warranties of merchantability and fitness for a particular purpose
+ * are disclaimed.  In no event shall the author be liable for any
+ * direct, indirect, incidental, special, exemplary, or consequential
+ * damages (including, but not limited to, procurement of substitute
+ * goods or services; loss of use, data, or profits; or business
+ * interruption) however caused and on any theory of liability,
+ * whether in contract, strict liability, or tort (including
+ * negligence or otherwise) arising in any way out of the use of this
+ * software, even if advised of the possibility of such damage.
+ */
 /* $Id: asf.c,v 1.4 2003/05/04 02:55:20 grog Exp grog $ */
 /* $FreeBSD$ */
 
@@ -72,7 +97,7 @@ usage(char *myname)
 {
     fprintf(stderr,
 	"Usage:\n"
-	"%s [-a] [-k] [modules-path [outfile]]\n\n"
+	"%s [-a] [-k] [-t] [modules-path [outfile]]\n\n"
 	"\t-a\tappend to outfile)\n"
 	"\t-k\ttake input from kldstat(8)\n",
 	"\t-x\tdon't append \".debug\" to module name\n",