Merge branch 'tr/packed-object-info-wo-recursion'

Attempts to reduce the stack footprint of sha1_object_info() and unpack_entry() codepaths. * tr/packed-object-info-wo-recursion: sha1_file: remove recursion in unpack_entry Refactor parts of in_delta_base_cache/cache_or_unpack_entry sha1_file: remove recursion in packed_object_info