Expose the amount of addresses that are passed from the authority
discovery module down to the network peer set manager as a priority
group in order to connect to the corresponding nodes.

```
authority_discovery_priority_group_size 10
```

* client/network-gossip: Move sink IO outside of state_machine

`ConsensusGossip` is supposed to be a deterministic state machine.
`GossipEngine` wrapping `ConsensusGossip` should handle IO operations.

This commit moves the `message_sink` IO operations to `GossipEngine`.
More specifically on incoming messages a `GossipEngine` calls
`ConsensusGossip::on_incoming` to validate and register the messages.
`ConsensusGossip` returns the valid messages which are then forwarded by
`GossipEngine` to the upper layer via the `message_sinks`.

* client/network-gossip: Adjust and extend tests

* Update client/network-gossip/src/bridge.rs

Co-authored-by: Benjamin Kampmann <[email protected]>

* Add RPC function state_getProof, resolves #1110

* Apply suggestions from code review

* Update client/rpc/src/state/state_full.rs

Co-Authored-By: Bastian Köcher <[email protected]>

* Update Cargo.lock

* Make block hash optional

* Wrap StorageProof as Bytes

* Add struct ReadProof

* Fix typo

Co-authored-by: Bastian Köcher <[email protected]>

Co-Authored-By: thiolliere <[email protected]>

* impl try_mutate for storage value and storage double map

* Docs + Reuse `try_mutate` in `mutate`

Co-Authored-By: Pierre Krieger <[email protected]>

* Improve tracing implementation

* Enable tracing in runtime interfaces

* Switch to `TRACE` level

* Pass max-total to RewardRemainder on end_era

* add test and event

* add doc

Co-authored-by: thiolliere <[email protected]>

* sc-cli: Use type-safe constructors for RPC/Prometheus interfaces

* service: Simplify rpc handler creation

Could probably be further simplifies once [this][commit] lands.

[commit]: https://github.com/paritytech/jsonrpc/commit/20485387ed06a48f1a70bf4d609a7cde6cf0accf

* service: Streamline some HTTP & WS server start logic

* client: Introduce a simple RPC policy mechanism

* rpc/system: Check unsafe RPCs

* rpc/offchain: Check unsafe RPCs

* rpc/author: Check unsafe RPCs

* Initial attempt to revise docs.

* Remove incorrect warning from Babe pallet

* Add more hints that collective flip is for low security

* Refactor misleading log

* Forgot to git add the compilation fix

* create moduleid command

* fill README

* make it work on the last master

* Make network_config_path an Option

* Fix network tests

* Use None as the network config path

* Fix cli

* Don't make PathBuf an Option in a cli context

* Add transaction_version

* Semantic versioning for runtimes

* Move new field to bottom

* Versioning

* Runtime versioning stuff.

* Fix test

* Adds tests and fixes bugs

* Bump runtime

Co-authored-by: Bastian Köcher <[email protected]>

* make new contructor

* add metrics to txpool

* fix review

* fix doc comment

* change to counters

* Update client/transaction-pool/src/metrics.rs

Co-Authored-By: Max Inden <[email protected]>

* Update client/transaction-pool/src/metrics.rs

Co-Authored-By: Max Inden <[email protected]>

* Update client/transaction-pool/src/metrics.rs

Co-Authored-By: Max Inden <[email protected]>

* Update client/transaction-pool/src/lib.rs

Co-Authored-By: Max Inden <[email protected]>

* Update client/transaction-pool/src/lib.rs

Co-Authored-By: Max Inden <[email protected]>

* use dedicated wrapper

Co-authored-by: Max Inden <[email protected]>

* emit TipClosed event on success tip payout

* test for events

* bump version

Instead of just listening on ipv4 by default, this enables listening on
ipv6 as well. While doing this, it also fixes a bug which lead to always
listen on all sockets, even if we specify listen addresses explicitly.

* Clean phragmen API and equalise()

* Stabilize new api

* Fix phragmen fuzzers

* More fixes

* Make fuzzers reproducible

* improvements

* Make equalize update assignments as well.

* total function for staked_assignment.

* Fix fuzzer build

* remvoe TODO

* Fix a bunch more.

* clean stray debug stuff

* Update primitives/phragmen/src/lib.rs

Co-Authored-By: thiolliere <[email protected]>

* fix range function

* fix number generator

Co-authored-by: thiolliere <[email protected]>

* Turn kbuckets_num_nodes into a GaugeVec

* random_kademlia_queries -> kademlia_random_queries

* kademalia_random_queries_total now a CounterVec

* Add metrics about records store

* Validate transaction timeouts

* Add timing

* Add tracing to transaction validation.

* Fix docs.

Co-authored-by: NikVolf <[email protected]>

* create parallel tasks extension

* make type system happy

* basic externalities

* test for dynamic extensions

* batching test

* remove premature verify_batch

* shnschnorrkel batch

* alter test

* shnschnorrkel test

* executive batching

* some docs

* also multi/any signatgures

* error propagation

* styling

* make verification extension optional

* experimental ed25519 parallelization

* some merge fallout

* utilize task executor

* merge fallout

* utilize task executor more

* another merge fallout

* feature-gate sp-io

* arrange toml

* fix no-std

* sr25519 batching and refactoring

* add docs

* fix name

* add newline

* fix block import test

* long sr25519 test

* blocking instead of parking

* move everything in crypto

* return batch_verify to check :)

* use condvars

* use multi-threaded executor for benches

* don't call via host interface

* try no spawning

* add true

* cleanup

* straighten batching

* remove signature check from this test (?)

* remove now pointless test

* remove another now useless test

* fix warnings

* Revert "remove another now useless test"

This reverts commit bbdec24bb67ed4373072daef7c863e1a8825bd8b.

* rethink the sp-io-part

* Revert "remove now pointless test"

This reverts commit 4d553066322e65782264caa6053d4cd5538df977.

* fix wording

* add  wording

* add todo and fix

* return check and fix

* add logging in sp-io

* Update primitives/io/src/batch_verifier.rs

Co-Authored-By: cheme <[email protected]>

* address review and use std condvar

* account for early exit

* address reivew

* address review

* more suggestions

* add docs for batch verification

* remove unused

* more review suggestions

* move to sp-runtime

* add expects

* remove blocks

* use entry

* Update primitives/io/src/batch_verifier.rs

Co-Authored-By: Bastian Köcher <[email protected]>

* Update primitives/externalities/src/extensions.rs

Co-Authored-By: Bastian Köcher <[email protected]>

* update overlooked note

* remove stupid return

* Update primitives/io/src/lib.rs

Co-Authored-By: Bastian Köcher <[email protected]>

* Update primitives/io/src/lib.rs

Co-Authored-By: Bastian Köcher <[email protected]>

* fix wording

* bump spec_version

Co-authored-by: cheme <[email protected]>
Co-authored-by: Bastian Köcher <[email protected]>

* client/authority-discovery: Allow to be run by sentry node

When run as a sentry node, the authority discovery module does not
publish any addresses to the dht, but still discovers validators and
sentry nodes of validators.

* client/authority-discovery/src/lib: Wrap lines at 100 characters

* client/authority-discovery: Remove TODO and unused import

* client/authority-discovery: Pass role to new unit tests

* client/authority-discovery: Apply suggestions

Co-Authored-By: André Silva <[email protected]>

* bin/node/cli/src/service: Use expressions instead of statements

Co-authored-by: André Silva <[email protected]>

* Add alternatives to system_networkState

* Fix tests

* Apply suggestions from code review

Co-Authored-By: Tomasz Drwięga <[email protected]>

Co-authored-by: Tomasz Drwięga <[email protected]>

* client/authority-discovery: Rework error handling

Instead of `handle_dht_events` returning a `Result<(), Error>`, return
a `Poll<Error>` where `Poll::Pending` signals that there are no more
events to handle and `Poll::Ready(Error)` signals that a fatal error
occured. Non fatal errors are handled within `handle_dht_events`
directly, thus looping in `poll` is not necessary anymore.

* client/authority-discovery: Return () instead of error on termiantion

* Update client/authority-discovery/src/lib.rs

Co-Authored-By: André Silva <[email protected]>

Co-authored-by: Bastian Köcher <[email protected]>
Co-authored-by: André Silva <[email protected]>

This release includes a fix for an out of bound access that was reported
by one of the validators.