Responding to these comments:

    https://github.com/ethereum/go-ethereum/pull/21502/files#r579010962
    https://github.com/ethereum/go-ethereum/pull/21502/files#r579021565
    https://github.com/ethereum/go-ethereum/pull/21502/files#r579023510
    https://github.com/ethereum/go-ethereum/pull/21502/files#r578983734

The oss-fuzz fuzzer has been reporting some failing testcases for les. They're all spurious, and cannot reliably be reproduced. However, running them showed that there was a goroutine leak: the tests created a lot of new clients, which started an exec queue that was never torn down.

This PR fixes the goroutine leak, and also a log message which was erroneously formatted.

* cmd/geth: remove copydb command

* eth/downloader: remove fakepeer

* eth/state, les/state: properly init statedb accesslist when tracing, fixes #22475

* eth: review comments

* eth/tracers: fix compilation err

* eth/tracers: apply @karalabe's suggested fix

Given a list of less than two elements DecodeRLP returned rlp.EOL,
leading to issues in outer decoders.

* les: add trailing slash to metric namespace

* les: omit '.' in metric namespace

tests: update reference tests with 2315 removed from Berlin

Revert "core/forkid, params: unset Berlin fork number"

core, eth: unship EIP 2315

build: add support for Ubuntu Hirsute Hippo

build: fix PPA failure due to updated debsrc

This reverts commit ba999105.

This updates the consensus tests to commit 31d6630 and
adds support for access list transactions in the test runner.
Co-authored-by: Martin Holst Swende <martin@swende.se>

* cmd: retire whisper flags

* cmd/geth: remove whisper configs

* cmd/utils: fix exclusive check for archive node

* cmd/utils: set the txlookuplimit to 0

This PR implements the first one of the "lespay" UDP queries which
is already useful in itself: the capacity query. The server pool is making
use of this query by doing a cheap UDP query to determine whether it is
worth starting the more expensive TCP connection process.

This replaces the github.com/pborman/uuid dependency with
github.com/google/uuid because the former is only a wrapper for
the latter (since v1.0.0).
Co-authored-by: Felix Lange <fjl@twurst.com>

all: define and enable the Berlin hard fork on all networks

This makes the WebSocket message size limit independent of the
limit used for HTTP requests. The new limit for WebSocket messages 
is 15MB.

* les: move serverPool to les/vflux/client

* les: add metrics

* les: moved ValueTracker inside ServerPool

* les: protect against node registration before server pool is started

* les/vflux/client: fixed tests

* les: make peer registration safe