[block-ref-repair] Block refcount recalculation and repair

- We always recalculate the reference count of a block before deleting
  it locally, to make sure that it is indeed zero.

- If we had to fetch a remote block but we were not able to get it,
  check that refcount is indeed > 0.

- Repair procedure that checks everything

1 files changed, 1 insertions, 0 deletions

diff --git a/src/block/lib.rs b/src/block/lib.rs
index 6c4711ef..944f0d83 100644
--- a/src/block/lib.rs
+++ b/src/block/lib.rs
@@ -11,3 +11,4 @@ mod metrics;
 mod rc;
 
 pub use block::zstd_encode;
+pub use rc::CalculateRefcount;