Standardize Levitte's dual-license

Reviewed-by: NRichard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3689)

crypto/LPdir_nyi.c

@@ -8,6 +8,9 @@
  */
 
 /*
+ * This file is dual-licensed and is also avialable under the following
+ * terms:
+ *
  * Copyright (c) 2004, Richard Levitte <richard@levitte.org>
  * All rights reserved.
  *

crypto/LPdir_unix.c

@@ -8,6 +8,9 @@
  */
 
 /*
+ * This file is dual-licensed and is also avialable under the following
+ * terms:
+ *
  * Copyright (c) 2004, Richard Levitte <richard@levitte.org>
  * All rights reserved.
  *

crypto/LPdir_vms.c

@@ -8,6 +8,9 @@
  */
 
 /*
+ * This file is dual-licensed and is also avialable under the following
+ * terms:
+ *
  * Copyright (c) 2004, Richard Levitte <richard@levitte.org>
  * All rights reserved.
  *

crypto/LPdir_win.c

@@ -8,6 +8,9 @@
  */
 
 /*
+ * This file is dual-licensed and is also avialable under the following
+ * terms:
+ *
  * Copyright (c) 2004, Richard Levitte <richard@levitte.org>
  * All rights reserved.
  *

crypto/LPdir_win32.c

@@ -8,6 +8,9 @@
  */
 
 /*
+ * This file is dual-licensed and is also avialable under the following
+ * terms:
+ *
  * Copyright (c) 2004, Richard Levitte <richard@levitte.org>
  * All rights reserved.
  *

crypto/LPdir_wince.c

@@ -8,6 +8,9 @@
  */
 
 /*
+ * This file is dual-licensed and is also avialable under the following
+ * terms:
+ *
  * Copyright (c) 2004, Richard Levitte <richard@levitte.org>
  * All rights reserved.
  *

crypto/x509v3/v3_pci.c

@@ -7,7 +7,11 @@
  * https://www.openssl.org/source/license.html
  */
 
-/* Copyright (c) 2004 Kungliga Tekniska Högskolan
+/*
+ * This file is dual-licensed and is also available under the following
+ * terms:
+ *
+ * Copyright (c) 2004 Kungliga Tekniska Högskolan
  * (Royal Institute of Technology, Stockholm, Sweden).
  * All rights reserved.
  *

crypto/x509v3/v3_pcia.c

@@ -7,7 +7,11 @@
  * https://www.openssl.org/source/license.html
  */
 
-/* Copyright (c) 2004 Kungliga Tekniska Högskolan
+/*
+ * This file is dual-licensed and is also available under the following
+ * terms:
+ *
+ * Copyright (c) 2004 Kungliga Tekniska Högskolan
  * (Royal Institute of Technology, Stockholm, Sweden).
  * All rights reserved.
  *

include/internal/o_dir.h

@@ -8,12 +8,9 @@
  */
 
 /*
- * Copied from Richard Levitte's (richard@levitte.org) LP library.  All
- * symbol names have been changed, with permission from the author.
- */
-
-/* $LP: LPlib/source/LPdir.h,v 1.1 2004/06/14 08:56:04 _cvs_levitte Exp $ */
-/*
+ * This file is dual-licensed and is also avialable under the following
+ * terms:
+ *
  * Copyright (c) 2004, Richard Levitte <richard@levitte.org>
  * All rights reserved.
  *