Found by @protolambda 

# Conflicts:
#	core/rawdb/freezer.go

This replaces the two-stage shutdown scheme with the one we
use almost everywhere else: a single quit channel signalling
termination.

Co-authored-by: Felix Lange <fjl@twurst.com>

* Disable symbol table and DWARF generation by default.
Trimpath if compiling with Go >= 1.13

* Set Go to minimum version 1.13. Revert debug symbol changes.
# Conflicts:
#	build/ci.go

* init

notes

removed some mentions of eth62, bumped protocol err too old to >=63

* remove sanity checks and bump supported protocol version up to 63

* remove 62 tests, still need to add 65

* remove 65 tests
# Conflicts:
#	eth/downloader/downloader_test.go
#	eth/downloader/peer.go

# Conflicts:
#	les/fetcher_test.go

This reduces complexity of some lengthy functions in worker.go,
making the code easier to read.
# Conflicts:
#	miner/worker.go

* cmd, consensus, eth, les: implement light fetcher

* les: address comment

* les: address comment

* les: address comments

* les: check td after delivery

* les: add linearExpiredValue for error counter

* les: fix import

* les: fix dead lock

* les: order announces by td

* les: encapsulate invalid counter

* les: address comment

* les: add more checks during the delivery

* les: fix log

* eth, les: fix lint

* eth/fetcher: address comment
# Conflicts:
#	cmd/geth/retesteth.go
#	consensus/clique/clique.go
#	consensus/consensus.go
#	consensus/ethash/consensus.go
#	consensus/ethash/sealer.go
#	eth/fetcher/block_fetcher.go
#	eth/fetcher/block_fetcher_test.go
#	eth/handler.go
#	les/client.go
#	les/client_handler.go
#	les/clientpool.go
#	les/fetcher.go
#	les/odr_test.go
#	les/peer.go
#	les/server.go
#	les/server_handler.go
#	les/test_helper.go
#	les/utils/expiredvalue.go
#	les/utils/expiredvalue_test.go

# Conflicts:
#	core/types/transaction.go
#	core/types/transaction_test.go

# Conflicts:
#	core/types/transaction.go
#	core/types/transaction_test.go

* cmd, core, eth, light, trie: dump clean cache periodically

* eth: update config

* trie: minor fix

* core, trie: address comments

* eth: remove useless

* trie: print clean cache dump start too

Co-authored-by: Péter Szilágyi <peterke@gmail.com>
# Conflicts:
#	core/blockchain.go
#	core/genesis.go
#	core/state/database.go
#	eth/api_tracer.go
#	eth/backend.go
#	eth/config.go
#	light/postprocess.go
#	trie/database.go

# Conflicts:
#	cmd/faucet/faucet.html

* implementation

* tidy gomod

* linters

* fix cmd test

* fix

* fix lint

* add blockhashes stage

* unwindOrder specified

* fixed typo

* added common.copybytes

* fixed little typo

* better progress

* better progress

* refactoring with etl

* added blockhashes to disabled stages in cmd/integration

* added migraations

* fixed go.mod

* better migrations

* rename unwind

* simplified migrations

* added onloadcommit

Geth 1.9.18

* eth/downloader: refactor downloader + queue

downloader, fetcher: throttle-metrics, fetcher filter improvements, standalone resultcache

downloader: more accurate deliverytime calculation, less mem overhead in state requests

downloader/queue: increase underlying buffer of results, new throttle mechanism

eth/downloader: updates to tests

eth/downloader: fix up some review concerns

eth/downloader/queue: minor fixes

eth/downloader: minor fixes after review call

eth/downloader: testcases for queue.go

eth/downloader: minor change, don't set progress unless progress...

eth/downloader: fix flaw which prevented useless peers from being dropped

eth/downloader: try to fix tests

eth/downloader: verify non-deliveries against advertised remote head

eth/downloader: fix flaw with checking closed-status causing hang

eth/downloader: hashing avoidance

eth/downloader: review concerns + simplify resultcache and queue

eth/downloader: add back some locks, address review concerns

downloader/queue: fix remaining lock flaw

* eth/downloader: nitpick fixes

* eth/downloader: remove the *2*3/4 throttling threshold dance

* eth/downloader: print correct throttle threshold in stats

Co-authored-by: Péter Szilágyi <peterke@gmail.com>
# Conflicts:
#	eth/downloader/downloader.go
#	eth/downloader/downloader_test.go
#	eth/downloader/queue.go
#	eth/downloader/statesync.go
#	eth/fetcher/block_fetcher.go

# Conflicts:
#	params/version.go