[dev] How to develop changes in a series

On Dec 5, 2018, Eric fried wrote:

This started off as a response to some questions Sundar asked, but Ithought it might be interesting/useful for new[er] OpenStack developers at large, so broadcasting.

Most of this is familiar material for those used to github process. The 'git restack' part is interesting, though it seems a lot like 'git rebase -i'. Eric answered far more than what I asked. Thanks, Eric. Regards, Sundar