* Add rpc_client api for getRecentPerformanceSamples
* Prep fn for variable avg slot time
* Use recent-perf-samples to more-accurately estimate epoch completed times
* Spell out average
* Deprecate commitment variants
* Add new CommitmentConfig builders
* Add helpers to avoid allowing deprecated variants
* Remove deprecated transaction-status code
* Include new commitment variants in runtime commitment; allow deprecated as long as old variants persist
* Remove deprecated banks code
* Remove deprecated variants in core; allow deprecated in rpc/rpc-subscriptions for now
* Heavier hand with rpc/rpc-subscription commitment
* Remove deprecated variants from local-cluster
* Remove deprecated variants from various tools
* Remove deprecated variants from validator
* Update docs
* Remove deprecated client code
* Add new variants to cli; remove deprecated variants as possible
* Don't send new commitment variants to old clusters
* Retain deprecated method in test_validator_saves_tower
* Fix clippy matches! suggestion for BPF solana-sdk legacy compile test
* Refactor node version check to handle commitment variants and transaction encoding
* Hide deprecated variants from cli help
* Add cli App comments
* Init cli RpcClient with chosen commitment; default to single_gossip
* Fill in missing client methods
* Cli tests: make RpcClient commitment specific
* Simply rpc_client calls, using configured commitment
* Check validator vote account with single-gossip commitment
* Add optimistically_confirmed field to TransactionStatus
* Update docs
* Convert new field to confirmation_status
* Update docs to confirmationStatus
* Update variants
* Update docs
* Just Confirmed
* Check program account before attempting to create it
* Use last_valid_slot to timeout status checks
* Include transaction history in RpcClient::get_signature_statuses requests
* Improve solana-deploy send-transactions
* Clippy
* Improve mock deploy test
* Review comments
* Add rpc endpoint to return the state of multiple accounts from the same bank
* Add docs
* Review comments: Dedupe account code, default to base64, add max const
* Add get_multiple_accounts to rpc-client
* Refactor bigtable apis to accept start and end keys
* Make helper fn to deserialize cell data
* Refactor get_confirmed_signatures_for_address to use get_row_data range
* Add until param to get_confirmed_signatures_for_address
* Add until param to blockstore api
* Plumb until through client/cli
* Simplify client params