* cmp to reference db if --reference_chaindata provided
* graceful shutdown
* add ./cmd/integration to makefile
* add interruption support for different stages
* don't compare errors directly
* save state
* walkAsOf by cs test passed
* cs search for plain state
* save state
* fix accounts tests
* refactor walkAsOf account tests
* fix storage test
* refactor walkAsOf storage tests
* fix lint
* fix test
* save state
* save state
* add test with fixed bits
* fmt
* add stages check
* fix lint
* fix lint
* remove obsoleted methods
```
go run ./cmd/integration reset --chaindata=...
go run ./cmd/integration state_stages -h
go run ./cmd/integration state_stages --chaindata=... --verbosity=3 --block=2_000_000 --unwind=10 --unwind_every=1_000
```
Also, it inherits flags from geth:
```
--pprof.cpuprofile=./cpu.out // to file
--pprof --pprof.port=6060 // launch pprof server
--metrics // sends to prometheus
```
* fix case: if header stage is ehead of body stage
* fix case: if header stage is ehead of body stage
* fix case: if header stage is ehead of body stage
* allow stage3 to sync to given block
* allow stage3 to sync to given block
* TestWatchNoDir not to be parallel
* Print ks and inc
* Print addrHash
* Change the buffer
* Print loading
* Skip
* More logging
* Error out earlier
* Handle empty codes
* Handle empty codes
* Remove logging
* Compare states
* Not do stage5
* compareBucket
* Preimage
* Clearer errors
* No need to clean up contract code
* Restore stage6
* Printing
* Skip the skipping
* Print all
* Change buffer type
* Add limit to stage5
* Always fail
* Remove exessive logging
* Restore buffer type
* Revert
* Print when exception
* Reenable skipping
* Skip storage items for deleted contracts
* not shortcut
* Remove removeAccount
* Re-enable state hashing
* Default to plain state
* Disable hashing state
* Reenable reset5
* Print unfurl list
* Enable removingAccount
* No printing
* Reenable stage5 commit
* Swap order of stages
* Prevent backwards promotion, reset tx lookup
* reset finish
* Introduce storage item replacement
* See if unwind works
* Restore removingAccount
* Don't do removeAccount for unwinding
* Possible fix
* Proper(er) fix
* Don't exclude unwinding
* Remove unwinding flag
* Fix formatting
* Fix lint
* Not to ignore blocks if they cause reorg
* Fix test, separate stages again
* Fix TestUnwind
* Fix stage
* Swap unwinding
* Revert to unwinding flag
* Print unfurl list
* Print
* Print inside receive
* Print after
* No printing
* Cleanup
* Not use blockCache when doing GetBlock
* Handle bucket error
* Replace with 0
* SetMaxDBs
* Set MaxDb before opening'
* Merge stage5 and stage6
* Fix lint
* Make downloader tests not parallel
* make lmdb default db
* switch nodes db to lmdb
* log errors in nodedb
* fix miss typing
* fix default test target in makefile
* report error of .Get method
* add debug info
* run tests with debug
* run tests with debug
* remove default db from TEST_DB env
* cleanup
* wait for goroutines finish
* wait for goroutines finish before close db
* wait for goroutines finish before close db
* wait for goroutines finish before close db
* wait for goroutines finish before close db
