2776c764d copying key when received
85d59d7c7 randomize only the IV part of prefix
git-subtree-dir: librocksdb-sys/rocksdb
git-subtree-split: 2776c764d099304c656a4515ee4d4383fb2b12b1
Reformat code
Extract log_size_for_flush into constant
Fix test nits
Rename Checkpoint to CheckpointBuilder and fix test nit
Add comment to LOG_SIZE_FOR_FLUSH and fix CheckpointBuilder comment
Rename CheckpointBuilder to Checkpoint and create_checkpoint to save_to
Rename save_to to create_checkpoint to be consistent with C API naming