Adds the HTTP plaintext demo from C SDK. No functionality is changed, but naming is updated appropriately. It is using freertos_plus_tcp plaintext transport implementation to send HTTP requests and then logs the response from the server.
Add demo to establish a mutually-authenticated network connection with the server before sending and verifying a simple POST request.
* Add demo files
* Move all "Http_Demo_Helpers" files into Common
* Update project files and add vendor config files
* Update http_demo_utils.c after backoff updates
A new repository, FreeRTOS/backoffAlgorithm, has been created for hosting the library for backoff calculation. This repo replaces the FreeRTOS-Plus/Source/Utilities/exponential_backoff with the submodule to the new repository, and updates all the demos that use retry logic to use the backoffAlgorithm API
Adding common utilities that will be used by 4 coreHTTP demos:
- Adding coreHTTP submodule pointer to FreeRTOS-Plus/Source/Application-Protocols/coreHTTP
- Adding folder FreeRTOS-Plus/Demo/coreHTTP_Windows_Simulator/Http_Demo_Helpers with functions common to demos.
