This PR significantly changes the APIs for instantiating Ethereum nodes in
a Go program. The new APIs are not backwards-compatible, but we feel that
this is made up for by the much simpler way of registering services on
node.Node. You can find more information and rationale in the design
document: https://gist.github.com/renaynay/5bec2de19fde66f4d04c535fd24f0775.

There is also a new feature in Node's Go API: it is now possible to
register arbitrary handlers on the user-facing HTTP server. In geth, this
facility is used to enable GraphQL.

There is a single minor change relevant for geth users in this PR: The
GraphQL API is no longer available separately from the JSON-RPC HTTP
server. If you want GraphQL, you need to enable it using the
./geth --http --graphql flag combination.

The --graphql.port and --graphql.addr flags are no longer available.

# Conflicts:
#	cmd/faucet/faucet.go
#	cmd/geth/chaincmd.go
#	cmd/geth/config.go
#	cmd/geth/consolecmd.go
#	cmd/geth/main.go
#	cmd/utils/flags.go
#	cmd/wnode/main.go
#	core/rawdb/freezer.go
#	eth/api_backend.go
#	eth/backend.go
#	ethclient/ethclient_test.go
#	ethstats/ethstats.go
#	graphql/service.go
#	internal/ethapi/backend.go
#	les/api_backend.go
#	les/api_test.go
#	les/checkpointoracle/oracle.go
#	les/client.go
#	les/commons.go
#	les/server.go
#	miner/stresstest/stress_clique.go
#	miner/stresstest/stress_ethash.go
#	mobile/geth.go
#	node/api.go
#	node/node.go
#	node/node_example_test.go
#	node/node_test.go
#	node/rpcstack.go
#	node/rpcstack_test.go
#	node/service.go
#	node/service_test.go
#	node/utils_test.go
#	p2p/simulations/examples/ping-pong.go
#	p2p/testing/peerpool.go
#	p2p/testing/protocolsession.go
#	p2p/testing/protocoltester.go
#	whisper/mailserver/server_test.go
#	whisper/whisperv6/api_test.go
#	whisper/whisperv6/filter_test.go
#	whisper/whisperv6/whisper.go
#	whisper/whisperv6/whisper_test.go

* Do not check for a non-nil ChainId

* Add encoding test

Resolves #20163

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

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