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

Co-authored-by: Martin Holst Swende <martin@swende.se>

This adds support for EIP-2718 typed transactions as well as EIP-2930
access list transactions (tx type 1). These EIPs are scheduled for the
Berlin fork.

There very few changes to existing APIs in core/types, and several new APIs
to deal with access list transactions. In particular, there are two new
constructor functions for transactions: types.NewTx and types.SignNewTx.
Since the canonical encoding of typed transactions is not RLP-compatible,
Transaction now has new methods for encoding and decoding: MarshalBinary
and UnmarshalBinary.

The existing EIP-155 signer does not support the new transaction types.
All code dealing with transaction signatures should be updated to use the
newer EIP-2930 signer. To make this easier for future updates, we have
added new constructor functions for types.Signer: types.LatestSigner and
types.LatestSignerForChainID. 

This change also adds support for the YoloV3 testnet.

Co-authored-by: Martin Holst Swende <martin@swende.se>
Co-authored-by: Felix Lange <fjl@twurst.com>
Co-authored-by: Ryan Schneider <ryanleeschneider@gmail.com>

Transaction unindexing will be enabled by default as of 1.10, which causes tx status retrieval will be broken without this PR. 

This PR introduces a retry mechanism in TxStatus retrieval.

This PR adds a more CLI flag, so that the les-server can serve light clients even the local node is not synced yet.

This functionality is needed in some testing environments(e.g. hive). After launching the les server, no more blocks will be imported so the node is always marked as "non-synced".