Hi Henning, Edward
First, i want to make some things clear, i was just stating that all "activity"/contributions (i.e commits pushed, pull requests made, issues submitted) made by another member on Github, will exist under his/her username as part of the record keeping on the site.
Obviously, you’ve agreed to release your own work(you are the developer) in compliance with the new LICENSE, which makes your work compatible with GPL, and therefore i can pick it up(cherry-pick your changes) and include it into FGAddon.
What Ryan is suggesting to go one step further, and delete the commit from history in your repository all together(this will prevent other users from forking your repository and rebasing prior to the LICENSE change), this can be done using git rebase -i "interactive" mode, let me sort this stuff out and collaborate with Edward whenever i'm in a pinch, you can also apply as he suggests for access rights your self on FGAddon, anyway, i'll send you the exact command to do this from the terminal via e-mail.
As been said, i can easily just cherry-pick your changes to FGAddon, but i will also follow Ryan's recommendation and produce a "clean" relicense-free repository for you to push, meanwhile, focus on making a stable branch for your aircraft locally, just as we agreed, and don't worry about this stuff.
Hamza