Standardize Levitte's dual-license

Reviewed-by: Richard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/3689)
diff --git a/crypto/LPdir_nyi.c b/crypto/LPdir_nyi.c
index 049044c..502f909 100644
--- a/crypto/LPdir_nyi.c
+++ b/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.
  *
diff --git a/crypto/LPdir_unix.c b/crypto/LPdir_unix.c
index 1bb2940..1599a6f 100644
--- a/crypto/LPdir_unix.c
+++ b/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.
  *
diff --git a/crypto/LPdir_vms.c b/crypto/LPdir_vms.c
index 1a5b60f..1f85ac7 100644
--- a/crypto/LPdir_vms.c
+++ b/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.
  *
diff --git a/crypto/LPdir_win.c b/crypto/LPdir_win.c
index 8f674d3..f40a91e 100644
--- a/crypto/LPdir_win.c
+++ b/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.
  *
diff --git a/crypto/LPdir_win32.c b/crypto/LPdir_win32.c
index 59ed485..9e6ca6d 100644
--- a/crypto/LPdir_win32.c
+++ b/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.
  *
diff --git a/crypto/LPdir_wince.c b/crypto/LPdir_wince.c
index dbc1052..5a5c0f2 100644
--- a/crypto/LPdir_wince.c
+++ b/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.
  *
diff --git a/crypto/x509v3/v3_pci.c b/crypto/x509v3/v3_pci.c
index 2c05edb..3d124fa 100644
--- a/crypto/x509v3/v3_pci.c
+++ b/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.
  *
diff --git a/crypto/x509v3/v3_pcia.c b/crypto/x509v3/v3_pcia.c
index e6f7a91..8d6af60 100644
--- a/crypto/x509v3/v3_pcia.c
+++ b/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.
  *