Fix the wrong license header.

ext/aws/FreeRTOSIPConfig.h.in

@@ -1,14 +1,29 @@
-/******************************************************************************
+/*
+ * FreeRTOS+TCP V2.2.1
+ * Copyright (C) 2017 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
  *
- * MEMC CONFIDENTIAL
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of
+ * this software and associated documentation files (the "Software"), to deal in
+ * the Software without restriction, including without limitation the rights to
+ * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+ * the Software, and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
  *
- * Copyright (C) MEMC Electronic Materials SpA, 2020
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
  *
- * Unauthorized copying of this file, via any medium, is strictly
- * prohibited.
- * Proprietary and confidential.
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
+ * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
+ * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
+ * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  *
- ******************************************************************************/
+ * http://www.FreeRTOS.org
+ * http://aws.amazon.com/freertos
+ *
+ * 1 tab == 4 spaces!
+ */
 
 #ifndef FREERTOS_IP_CONFIG_H
 #define FREERTOS_IP_CONFIG_H