Dulwich

* Handle alternate case for worktreeconfig setting (Will Shanks, 1285)

* Ship rust files. (Jelmer Vernooij, 1287)

* Stop installing docs/ as part of package code. (Jelmer Vernooij, 1248)

* Move tests to root. (Jelmer Vernooij, 1024)

* Convert the optional C implementations to Rust.
(Jelmer Vernooij)

* Fix NameError when encountering errors during HTTP operation.
(Jelmer Vernooij, 1208)

* Raise exception when default identity can't be found.
(Jelmer Vernooij)

* Add a dedicated exception class for unresolved
deltas. (Jelmer Vernooij, 1221)

* Support credentials in proxy URL. (Jelmer Vernooij, 1227)

* Add ``dulwich.porcelain.for_each_ref``. (Daniele Trifirò)

* Convert _objects.c to rust.
(Jelmer Vernooij)

* index: Handle different stages of conflicted paths.
(Kevin Hendricks, Jelmer Vernooij)

* Improve LCA finding performance. (Kevin Hendricks)

* client: Handle Content-Type with encoding set.
(Antoine Lambert)

* Only import _hashlib for type checking.
(David Hotham)

* Update docs regarding building dulwich without c bindings (103)
(Adam Plaice)

* objects: Define a stricter return type for _parse_message
(Vincent Lorentz)

* Raise GitProtocolError when encountering HTTP Errors in
HTTPGitClient. (Jelmer Vernooij, 1199)

* Be more tolerant to non-3-length tuple versions.
(Jelmer Vernooij)

* Add support for ``worktreeconfig`` extension.
(Jelmer Vernooij)

* Deprecate ``Commit.extra``; the Git project specifically
discourages adding custom lines, and the contents of
``Commit.extra`` are unpredictable as contents
may be different between different versions of Dulwich
with support for different headers.

``Commit._extra`` still exists.
(Jelmer Vernooij)