RFR: git-defpath: add support for --upstream and --fork

[Robin Westberg]

On Mon, 9 Dec 2019 13:30:39 GMT, Erik Helin <ehelin at openjdk.org> wrote:

> Hi all,
> 
> please review this patch that adds support for the `--upstream` and `--fork` arguments to `git-defpath` (note that `git defpath --fork` might fork the repo as a side-effect). I also made the rest of the arguments to `git-defpath` configurable.
> 
> Thanks,
> Erik
> 
> ## Testing
> - [x] Manual testing of `git-defpath`

Looks good as well!

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Marked as reviewed by rwestberg (Reviewer).

PR: https://git.openjdk.java.net/skara/pull/302