* SDK: Add sysvar to expose recent block hashes to programs
* Blockhashes is one word
* Missed one
* Avoid allocs on update
* unwrap_or_else
* Use iterators
* Add microbench
* Revert "unwrap_or_else"
This reverts commit a8f8c3bfbe0d88e2229e67a29e9d2b489b93ff62.
* Revert "Avoid allocs on update"
This reverts commit 486f01790c271cf09ac3dbffba0e40e526e81324.
* Be able to create bank snapshots
* fix clippy
* load snapshot on start
* regenerate account index from the storage
* Remove rc feature dependency
* cleanup
* save snapshot for slot 0