Dulwich

* Add support for multivars in configuration.
(Jelmer Vernooij, 718)

* Fix handling of escaped characters in ignore patterns.
(Jelmer Vernooij, 930)

* Add ``dulwich.contrib.requests_vendor``. (epopcon)

* Ensure git config is available in a linked working tree.
(Jesse Cureton, 926)

* Properly close result repository during test.
(Jelmer Vernooij, 928)

* Add GitClient.clone(). (Jelmer Vernooij, 920)

* Support staging submodules.
(Jelmer Vernooij)

* Drop deprecated Index.iterblobs and iter_fresh_blobs.
(Jelmer Vernooij)

* Unify clone behaviour of ``Repo.clone`` and
``porcelain.clone``, and add branch parameter for
clone. (Peter Rowlands, 851)