Update license to GPLv3

Author: embhorn

IDE/Espressif/ESP-IDF/examples/AWS_IoT_MQTT/components/wolfmqtt/README.md

@@ -3,7 +3,7 @@
 [wolfMQTT](https://www.wolfMQTT.com) provides commercial-grade, world-class encryption libraries to secure connections
 from tiny embedded devices to the largest cloud and super computing platforms.
 
-Makers and students can use these libraries free of charge, as long as they abide by abide by the terms of GPLV2 licensing.
+Makers and students can use these libraries free of charge, as long as they abide by abide by the terms of GPLV3 licensing.
 
 Commercial customers are invited to contact wolfSSL for licensing options.
 Visit [wolfSSL.com/Espressif/](https://www.wolfSSL.com/Espressif/) to learn

IDE/Espressif/ESP-IDF/examples/AWS_IoT_MQTT/components/wolfssl/README.md

@@ -154,7 +154,7 @@ Have a specific request or questions? We'd love to hear from you! Please contact
 
 ## Licensing and Support
 
-wolfSSL (formerly known as CyaSSL) and wolfCrypt are either licensed for use under the GPLv2 (or at your option any later version) or a standard commercial license. For our users who cannot use wolfSSL under GPLv2 (or any later version), a commercial license to wolfSSL and wolfCrypt is available.
+wolfSSL (formerly known as CyaSSL) and wolfCrypt are either licensed for use under the GPLv3 (or at your option any later version) or a standard commercial license. For our users who cannot use wolfSSL under GPLv3 (or any later version), a commercial license to wolfSSL and wolfCrypt is available.
 
 See the LICENSE.txt, visit wolfssl.com/license, contact us at licensing@wolfssl.com or call +1 425 245 8247
 

IDE/Espressif/ESP-IDF/examples/wolfmqtt_template/components/wolfmqtt/README.md

@@ -3,7 +3,7 @@
 [wolfMQTT](https://www.wolfMQTT.com) provides commercial-grade, world-class encryption libraries to secure connections
 from tiny embedded devices to the largest cloud and super computing platforms.
 
-Makers and students can use these libraries free of charge, as long as they abide by abide by the terms of GPLV2 licensing.
+Makers and students can use these libraries free of charge, as long as they abide by abide by the terms of GPLV3 licensing.
 
 Commercial customers are invited to contact wolfSSL for licensing options.
 Visit [wolfSSL.com/Espressif/](https://www.wolfSSL.com/Espressif/) to learn

IDE/Espressif/ESP-IDF/examples/wolfmqtt_template/components/wolfssl/README.md

@@ -154,7 +154,7 @@ Have a specific request or questions? We'd love to hear from you! Please contact
 
 ## Licensing and Support
 
-wolfSSL (formerly known as CyaSSL) and wolfCrypt are either licensed for use under the GPLv2 (or at your option any later version) or a standard commercial license. For our users who cannot use wolfSSL under GPLv2 (or any later version), a commercial license to wolfSSL and wolfCrypt is available.
+wolfSSL (formerly known as CyaSSL) and wolfCrypt are either licensed for use under the GPLv3(or at your option any later version) or a standard commercial license. For our users who cannot use wolfSSL under GPLv3 (or any later version), a commercial license to wolfSSL and wolfCrypt is available.
 
 See the LICENSE.txt, visit wolfssl.com/license, contact us at licensing@wolfssl.com or call +1 425 245 8247
 

IDE/STM32CUBE/README.md

@@ -8,7 +8,7 @@ The wolfMQTT Cube Pack can be found [here](https://www.wolfssl.com/files/ide/I-C
     - Run the “STM32CubeMX” tool.
     - Under “Manage software installations” pane on the right, click “INSTALL/REMOVE” button.
     - From Local and choose “I-CUBE-wolfMQTT.pack”.
-    - Accept the GPLv2 license. Contact wolfSSL at sales@wolfssl.com for a commercial license and support/maintenance.
+    - Accept the GPLv3 license. Contact wolfSSL at sales@wolfssl.com for a commercial license and support/maintenance.
 
 3. Create an STM32 project for your board and open the `.ioc` file. Click the `Software Packs` drop down menu and then `Select Components`. Expand the `wolfMQTT` pack and check the Core and Examples components. If you intend to use TLS with you MQTT client, check the TLS component as well. All this will do is enforce the dependency to wolfSSL. To enable TLS support in the wolfMQTT code base, you will have to turn it on in the wolfMQTT settings in the `.ioc` file.