Re: [PATCH v6 2/4] submodule update: add --remote for submodule's upstream changes

As an example to make this clearer:

  $ cat .gitmodules
  [submodule "sub1"]
    path = sub1
    url = git://example.com/sub1.git
    remote = remote1
    branch = branch1
    update-source = submodule-upstream
    update = rebase
  [submodule "sub2"]
  ...

Means that `git submodule update sub1` will fetch remote1 and rebase the current sub1 checkout against the tip of remote1/branch1. The git://example.com/sub1.git URL is not actually used during this update. Presumably the user setup remote1 intentionally in the submodule, and wants to use the URL they've configured there.

Perhaps I need to ammend my

  submodule update: add submodule.<name>.remote config option

patch (#4) to adjust the remote that has it's URL changed by `sync`?

I may also want to append some form of the following commit (from my submodule.<name>.active proposal):

  submodule add: configure existing submodule url if not set [1]

Cheers, Trevor

[1]: https://github.com/wking/git/commit/b045c16cffe6eb86c157a6c7397166a46e147442