Merge branch 'sp/maint-index-pack'

* sp/maint-index-pack:
  index-pack: Honor core.deltaBaseCacheLimit when resolving deltas
  index-pack: Track the object_entry that creates each base_data
  index-pack: Chain the struct base_data on the stack for traversal
  index-pack: Refactor base arguments of resolve_delta into a struct

diff --cc index-pack.c
Simple merge