* Flag to force kusama runtime

* Chainspecs for kusama

* Polkadot config for westend

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

* network/src/legacy/gossip: Wrap GossipEngine in Arc Mutex & lock it on use

`GossipEngine` in itself has no need to be Send and Sync, given that it
does not rely on separately spawned background tasks anymore.
`RegisteredMessageValidator` needs to be `Send` and `Sync` due to the
inherited trait bounds from implementing `GossipService`. In addition
`RegisteredMessageValidator` derives `Clone`. Thereby `GossipEngine`
needs to be wrapped in an `Arc` and `Mutex` to keep the status quo.

* Needed fixes.

* Fixes

* Fixed build

* Fixed build w benchmarking CLI

* Fixed building tests

* Added --dev shortcut

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

* fix

* Starting to add benchmarks

* make compile

* add benchmarks

* Make work with Substrate master

* Bench validate unsigned

* back to polkadot master

* starting to add cli with feature flag

* more stuff

* Add to kusama

* Update Cargo.lock

* fix dev dep

* bump wasm builder

* Remove encode from keccak benchmark

* bump spec

* Add weight documentation

* Update Cargo.lock

* Update check_runtime.sh

* Update publish_draft_release.sh

* Update Cargo.lock

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

Make sure that --dev purge-chain is rejected

```
[0] [11:24:02] ~/r/polkadot master > ./target/debug/polkadot purge-chain --dev -y
"/home/cecile/.local/share/polkadot/chains/dev/db" did not exist.
[0] [11:25:36] ~/r/polkadot cecton-fix-invalid-argument-order > ./target/debug/polkadot --dev purge-chain -y
error: Found argument 'purge-chain' which wasn't expected, or isn't valid in this context

USAGE:
    polkadot --dev

For more information try --help
```

* Update to latest Substrate master

* upgrade decl_storage declaration

* Companion PR to Substrate#4752

* Substrate update: Identity should bound additional fields (#4770)

Substrate commit: 2c9ce7296b19934b1ffd50150be2fdb2ddf81a4e

* WIP

* WIP

* Updated substrate and fixes

* Fix compilation and switch to latest wasm-builder-runner

* Fixed missing doc

* Update collator/src/lib.rs

Co-authored-by: Bastian Köcher <[email protected]>
Co-authored-by: thiolliere <[email protected]>
Co-authored-by: Pierre Krieger <[email protected]>
Co-authored-by: Cecile Tonglet <[email protected]>