* replace bitvec with more efficient bitpack algorithm
* optimise proof_unpack_len
* move proof pack length calculation
* small refactor
* first pass attempt at not deserializing proof nonces in difficulty iter
* another 10 seconds gained by not deserialising the proof from the difficulty iterator
* add new deser parameters to tests where needed
* add skip_proof variants to store
* remove hash from difficulty iterator struct, rename HeaderInfo to HeaderDifficultyInfo
* replace bitvec with more efficient bitpack algorithm
* optimise proof_unpack_len
* move proof pack length calculation
* small refactor
* first pass attempt at not deserializing proof nonces in difficulty iter
* another 10 seconds gained by not deserialising the proof from the difficulty iterator
* add new deser parameters to tests where needed
* add skip_proof variants to store
* remove hash from difficulty iterator struct, rename HeaderInfo to HeaderDifficultyInfo
* variants for output_pos linked list entries (head/tail/middle/unique)
next and prev and Vec<u8> lmdb keys
* get_pos on enum
* break list and list entries out into separate enums
* track output features in the new output_pos index, so we can determine coinbase maturity
* push entry impl for none and unique
* some test coverage for output_pos_list
* commit
* wip - FooListEntry
* use instance of the index
* linked list of output_pos and commit_pos both now supported
* linked_list
* cleanup and rename
* rename
* peek_pos
* push some, peek some, pop some
* cleanup
* commit pos
cleanup
* split list and entry out into separate db prefixes
* cleanup and add placeholder for pop_back
* pop_pos_back (for popping off the back of the linked list)
test coverage for pop_pos_back
* wip
* placeholder for prune via a trait
pos must always increase in the index
* rewind kernel_pos_idx when calling rewind_single_block
* RewindableListIndex with rewind support.
* test coverage for rewindable list index
* test coverage for rewind back to 0
* rewind past end of list
* add tests for kernel_pos_idx with multiple commits
* commit
* cleanup
* hook NRD relative lock height validation into block processing and tx validation
* cleanup
* set local chain type for kernel_idx tests
* add test coverage for NRD rules in block processing
* NRD test coverage and cleanup
* NRD relative height 1 test
* test coverage for NRD kernels in block processing
* cleanup
* start of test coverage for txpool NRD kernel rules
* wip
* rework pool tests to use real chain (was mock chain) to better reflect reality (tx/block validation rules etc.)
* cleanup
* cleanup pruneable trait for kernel pos index
* add clear() to kernel_pos idx and test coverage
* hook kernel_pos rebuild into node startup, compaction and fast sync
* verify full NRD history on fast sync
* return early if nrd disabled
* fix header sync issue
ardocrat