* Add selected chain store and optimize block locator with it
* Fix build error
* Fix comments
* Fix IsStaged
* Rename CalculateSelectedParentChainChanges to CalculateChainPath and SelectedParentChainChanges->SelectedChainPath
* Use binary.LittleEndian directly to allow compiler optimizations
* Remove boolean from HeadersSelectedChainStore interface
* Prevent endless loop in block locator
* Remove the limit on the amount of hashes returned from antiPastHashesBetween.
* Guard against requests with a non-existing block hash.
* Move missing-block-hash guards to consensus.go.
* Ban a peer that doesn't send us all the requested headers during IBD.
* Extract blockHeap.ToSlice.
* Re-request headers in requestHeaders if we didn't receive the highHash.
* Get rid of insertMode
* Rename AddBlockToVirtual->AddBlock
* When F is not in the future of P, enforce finality with P and not with F.
* Don't allow blocks with invalid parents or with missing block body
* Check finality violation before checking block status
* Implement CalculateIndependentPruningPoint
* Move checkBlockStatus to validateBlock
* Add ValidateBlock to block processor interface
* Adjust SetPruningPoint to the new IBD flow
* Add pruning store to CSM's constructor
* Flip wrong condition on AddHeaderTip
* Fix func (hts *headerSelectedTipStore) Has
* Fix block stage order
* Call to ValidateBodyInContext from validatePostProofOfWork
* Enable overrideDAGParams
* Update log
* Rename SetPruningPoint to ValidateAndInsertPruningPoint and move most of its logic inside block processor
* Rename hasValidatedHeader->hasValidatedOnlyHeader
* Fix typo
* Name return values for fetchMissingUTXOSet
* Add comment
* Return ErrMissingParents when block body is missing
* Add logs and comments
* Fix merge error
* Fix pruning point calculation to be by virtual selected parent
* Replace CalculateIndependentPruningPoint to CalculatePruningPointByHeaderSelectedTip
* Fix isAwaitingUTXOSet to check pruning point by headers
* Change isAwaitingUTXOSet indication
* Remove IsBlockInHeaderPruningPointFuture from BlockInfo
* Fix LowestChainBlockAboveOrEqualToBlueScore
* Add validateNewPruningPointTransactions
* Add validateNewPruningAgainstPastUTXO
* Rename set_pruning_utxo_set.go to update_pruning_utxo_set.go
* Check missing block body hashes by missing block instead of status
* Validate pruning point against past UTXO with the pruning point as block hash
* Remove virtualHeaderHash
* Fix comment
* Fix imports
* [NOD-1579] Remove selected tip hash messages.
* [NOD-1579] Start moving IBD stuff into blockrelay.
* [NOD-1579] Rename relaytransactions to transactionrelay.
* [NOD-1579] Move IBD files into blockrelay.
* [NOD-1579] Remove flow stuff from ibd.go.
* [NOD-1579] Bring back IsInIBD().
* [NOD-1579] Simplify block relay flow.
* [NOD-1579] Check orphan pool for missing parents to avoid unnecessary processing.
* [NOD-1579] Implement processOrphan.
* [NOD-1579] Implement addToOrphanSetAndRequestMissingParents.
* [NOD-1579] Fix TestIBD.
* [NOD-1579] Implement isBlockInOrphanResolutionRange.
* [NOD-1579] Implement limited block locators.
* [NOD-1579] Add some comments.
* [NOD-1579] Specifically check for StatusHeaderOnly in blockrelay.
* [NOD-1579] Simplify runIBDIfNotRunning.
* [NOD-1579] Don't run IBD if it is already running.
* [NOD-1579] Fix a comment.
* [NOD-1579] Rename mode to syncInfo.
* [NOD-1579] Simplify validateAndInsertBlock.
* [NOD-1579] Fix bad SyncStateSynced condition.
* [NOD-1579] Implement validateAgainstSyncStateAndResolveInsertMode.
* [NOD-1579] Use insertModeHeader.
* [NOD-1579] Add logs to TrySetIBDRunning and UnsetIBDRunning.
* [NOD-1579] Implement and use dequeueIncomingMessageAndSkipInvs.
* [NOD-1579] Fix a log.
* [NOD-1579] Fix a bug in createBlockLocator.
* [NOD-1579] Rename a variable.
* [NOD-1579] Fix a slew of bugs in missingBlockBodyHashes and selectedChildIterator.
* [NOD-1579] Fix bad chunk size in syncMissingBlockBodies.
* [NOD-1579] Remove maxOrphanBlueScoreDiff.
* [NOD-1579] Fix merge errors.
* [NOD-1579] Remove a debug log.
* [NOD-1579] Add logs.
* [NOD-1579] Make various go quality tools happy.
* [NOD-1579] Fix a typo in a variable name.
* [NOD-1579] Fix full blocks over header-only blocks not failing the missing-parents validation.
* [NOD-1579] Add an error log about a condition that should never happen.
* [NOD-1579] Check all antiPast hashes instead of just the lowHash's anticone to filter for header-only blocks.
* [NOD-1579] Remove the nil stuff from GetBlockLocator.
* [NOD-1579] Remove superfluous condition in handleRelayInvsFlow.start().
* [NOD-1579] Return a boolean from requestBlock instead of comparing to nil.
* [NOD-1579] Fix a bad log.Debugf.
* [NOD-1579] Remove a redundant check.
* [NOD-1579] Change an info log to a warning log.
* [NOD-1579] Move OnNewBlock out of relayBlock.
* [NOD-1579] Remove redundant exists check from runIBDIfNotRunning.
* [NOD-1579] Fix bad call to OnNewBlock.
* [NOD-1579] Remove an impossible check.
* [NOD-1579] Added a log.
* [NOD-1579] Rename insertModeBlockWithoutUpdatingVirtual to insertModeBlockBody.
* [NOD-1579] Add a check for duplicate headers.
* [NOD-1579] Added a comment.
* [NOD-1579] Tighten a stop condition.
* [NOD-1579] Simplify a log.
* [NOD-1579] Clarify a log.
* [NOD-1579] Move a log.
