Merge branch 'mt/use-passed-repo-more-in-funcs'

Some codepaths were given a repository instance as a parameter to
work in the repository, but passed the_repository instance to its
callees, which has been cleaned up (somewhat).

* mt/use-passed-repo-more-in-funcs:
  sha1-file: allow check_object_signature() to handle any repo
  sha1-file: pass git_hash_algo to hash_object_file()
  sha1-file: pass git_hash_algo to write_object_file_prepare()
  streaming: allow open_istream() to handle any repo
  pack-check: use given repo's hash_algo at verify_packfile()
  cache-tree: use given repo's hash_algo at verify_one()
  diff: make diff_populate_filespec() honor its repo argument

diff --cc builtin/fast-export.c
Simple merge

diff --cc builtin/pack-objects.c
Simple merge

diff --cc cache.h
Simple merge

diff --cc convert.c
Simple merge

diff --cc diff.c
Simple merge

diff --cc dir.c
Simple merge

diff --cc object-store.h
Simple merge

diff --cc object.c
Simple merge

diff --cc sha1-file.c
Simple merge