Optional replacement for bootstrap.pkl
This python code is a step towards not needing a bootstrap.
A new unit test checks that a generated bootstrap.pkl generated with the current release matches the stored bootstrap.pkl
Additionally, there is a new option to store a CA with a bootstrap generated in pure(-ish) Python. In the next MR I will improve this further - eventually either "basic default bootstrap from python" or "no bootstrap" should be the most used options.
Edited by Stewart Martin-Haugh