* change paths to something accounts_db (the singleton) owns, fixes SIGILL
* fail deserialize if paths don't work
serialize paths, too
* test that paths are populated from a bank snapshot
* accounts_index: RwLock per-account
Lots of lock contention on the accounts_index lock,
only take write-lock on accounts_index if we need to insert/remove an
account.
For updates, take a read-lock and then write-lock on the individual
account.
* Remove unneeded enumerate and add comments.
* runtime: Add bench for accounts::hash_internal_state
* fixup! cargo fmt
* fixup! cargo clippy
* fixup! Use a more representitive number of accounts
* fixup! More descriptive name for accounts creation helper
* Implement CreditOnlyLocks
* Update credit-only atomic on account load
* Update credit-only atomic after bank.freeze_lock; store credits if all credit-only lock references are dropped
* Commit credit-only credits on bank freeze
* Update core to CreditAccountLocks
* Impl credit-only in System Transfer
* Rework CreditAccountLocks, test, and fix bugs
* Review comments: Pass CreditAccountLocks by reference; Tighten up insert block
* Only store credits on completed slot
* Check balance in bench_exchange funding to ensure commit_credits has completed
* Add is_debitable info to KeyedAccount meta to pass into programs
* Reinstate CreditOnlyLocks check on lock_account
* Rework CreditAccountLocks to remove strong_count usage
* Add multi-threaded credit-only locks test
* Improve RwLocks usage
* Review comments: panic if bad things happen; tighter code
* Assert lock_accounts race does not happen
* Revert panic if bad things happen; not a bad thing
* Add storage point tracking and tie in storage rewards to epochs and economics
* Prevent validators from updating their validations for a segment
* Fix test
* Retain syscall scoping for readability
* Update Credits to own epoch tracking
* add MiningPool fund validator MinigPools from inflation
* fixup
* finish rename of MINIMUM_SLOT_LENGTH to MINIMUM_SLOTS_PER_EPOCH
* deterministic miningpool location
* point_value, not credit_value... use f64
