*** VC Directory buffers now display the upstream branch in Git repositories.
The "upstream branch" is the branch from which 'vc-pull' fetches changes
by default. In Git terms, the upstream branch of branch B is determined
-by configuration variables branch.B.remote and branch.B.merge.
+by configuration variables 'branch.B.remote' and 'branch.B.merge'.
When these configuration variables are set for the current branch, the
VC Directory buffer will show the corresponding upstream branch under