Git 2.7.3

1. abcb865 pack-objects: match prune logic for discarding objects by Jeff King · 11 years ago
2. d3038d2 prune: keep objects reachable from recent objects by Jeff King · 11 years ago
3. dc34719 prune: show progress while marking reachable objects by Nguyễn Thái Ngọc Duy · 14 years ago
4. 9442147 Move traversal of reachable objects into a separate library. by Junio C Hamano · 19 years ago