This PR adds the configuration option `core.remote_from_branch`.
If set, the default remote is inferred from the current checked-out branch.

If unset or if `core.default_remote` is set, the behaviour is unchanged.

Fixes: https://github.com/zaquestion/lab/issues/896

• Commit 7f3c224
• #897: Guess remote from current branch
• Branch master

glemco