Example22: Payload Select Config Page

[robertlong13]

Adds an example for the new plugin config/setup page interface: #3433.

This example implements a payload selection page to reconfigure parameters based on what payload you have installed:

By default, this plugin doesn't load. Someone has to add payloads to the .cs file first.

If we like this, I'll write up a post about it on Discuss.

[EosBandi]

It is a better example than what I had in my mind, since it does have a valid function, not just a simple example.
Thanks for adding it !