• Define __all__ in all modules, listing the public names each module defines. (Jelmer Vernooij)
• Deprecate importing LOCAL_TAG_PREFIX, SYMREF, check_ref_format, read_packed_refs, read_packed_refs_with_peeled and write_packed_refs from dulwich.repo; import them from dulwich.refs instead. Likewise BundleList, fetch_bundle_uri and parse_bundle_list should be imported from dulwich.bundle_uri rather than dulwich.client. (Jelmer Vernooij)
• Restore dulwich.index.SHA1Reader and dulwich.index.SHA1Writer, which were dropped in 1.2.16, as deprecated aliases for the classes in dulwich.pack. (Jelmer Vernooij)
• Refuse to write a loose ref through a symref whose target escapes the ref store. (Kartik Kenchi, Jelmer Vernooij)