Deinitialize the SDL_net library.
This must be called when done with the library, probably at the end of your program.
It is safe to call this multiple times; the library will only deinitialize once, when this function is called the same number of times as SDLNet_Init was successfully called.
Once you have successfully deinitialized the library, it is safe to call SDLNet_Init to reinitialize it for further use.
It is safe to call this function from any thread.
This function is available since SDL_Net 3.0.0.