Log Message:
py-dulwich: updated to 0.19.9

0.19.9:
 BUG FIXES
 * Avoid fetching ghosts in Repo.fetch.
 * Preserve port and username in parsed HTTP URLs.
 * Add basic server side implementation of git-upload-archive.

0.19.8:
 * Fix encoding when reading README file in setup.py.

0.19.7:
 CHANGES
  * Drop support for Python 3 < 3.4. This is because
    pkg_resources (which get used by setuptools and mock)
    no longer supports 3.3 and earlier.

 IMPROVEMENTS
  * Support depth argument to GitClient.fetch_pack and support
    fetching and updating shallow metadata.

 BUG FIXES
  * Don't write to stdout and stderr when they are not available
  * Fix compatibility with newer versions of git, which expect CONTENT_LENGTH
    to be set to 0 for empty body requests.
  * Raise an exception client-side when a caller tries to request
    SHAs that are not directly referenced the servers' refs.
  * Raise more informative errors when unable to connect to repository
    over SSH or subprocess.
  * Handle commit identity fields with multiple ">" characters.

 IMPROVEMENTS
  * dulwich.porcelain.get_object_by_path method for easily
    accessing a path in another tree.
  * Support the i18n.commitEncoding setting in config.