* increase limits, improve logging

* format in kB

* client/finality-grandpa: Add regression test observer polling network

Ensure `Future` implementation of `ObserverWork` is polling its
`NetworkBridge`. Regression test for bug introduced in d4fbb897 and
fixed in 7d58ceeb

.

When polled, `NetworkBridge` forwards reputation change requests from
the `GossipValidator` to the underlying `dyn Network`. This test
triggers a reputation change by calling `GossipValidator::validate` with
an invalid gossip message. After polling the `ObserverWork` which should
poll the `NetworkBridge`, the reputation change should be forwarded to
the test network.

* Nits

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

* Adding Serde:Deserialise to UncheckExtrinsics

to be able to use the ChainApi RPC from the client side

* Update primitives/runtime/src/generic/unchecked_extrinsic.rs

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

* Initial version.

* Fix tests.

* Refactor using StorageValueRef.

* Add tests and apply review suggestions.

* Bump runtime.

Co-authored-by: Gavin Wood <[email protected]>

* Small follow-up docs improvements in rent module

* Update frame/contracts/src/rent.rs

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

* Use a shorter version of the sentence

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

* Initial approach

* Introduce the pallet-contracts-common crate

* Add rent::compute_rent_projection

* Wire everything together

* Fix build error.

* Rename EvictionDate → EvictionAt.

* Clean.

* Renaming and cleaning.

* Add documentation for rent_projection RPC.

* Add documentation for rent_projection runtime API.

* Refactor rent_budget.

Merge it with subsistence_treshold.

* Bump impl_version

* Constrain RPC impl with Block::Header::Number.

* Rename pallet-contracts-common into -primitives

* Add a comment for `compute_rent_projection` on the usage

* Small tidying

* Update to the latest crate names

* Add to post initial rename fixes

* Cleanup transaction pool deps

* Fix it properly

* Fix doc test

* Expose information about the extrinsic in the metadata

This pr exposes some information about the extrinsic used in the runtime
via metadata. The following information are exposed:

- Version of the extrinsic
- List of all signed extensions used by the extrinsic.

* Increment `spec_version`

To my knowledge, we don't keep wasm blobs checked in anymore.

This reverts commit 72ff737d.

It changes the way we extended the CLI functionalities of substrate to allow more flexibility. (If this was not clear, here is another version: it changes the `sc_cli` API to allow more flexibility).

This touches a few important things:
 - the startup of the async task with tokei:
    This was in node and node-template and I moved it to substrate. The idea is to have 1 time the code that handles unix signals (SIGTERM and SIGINT) properly. It is however possible to make this more generic to wait for a future instead and provide only a helper for the basic handling of SIGTERM and SIGINT.
 - increased the version of structopt and tokei
 - no more use of structopt internal's API
 - less use of generics

Related to #4643 and https://github.com/paritytech/cumulus/pull/42: the implementation of "into_configuration" and "get_config" are similar but with better flexibility so it is now possible in cumulus to have the command-line arguments only of the run command for polkadot if we want

Related to https://github.com/paritytech/cumulus/issues/24 and https://github.com/paritytech/cumulus/issues/34 : it will now be possible to make a configuration struct for polkadot with some overrides of the default parameters much more easily.

I don't see any good reason to build with --release to test this but this step takes 8-8:30 min on the CI and I suspect we would save some time by using the debug build instead.

Patch d4fbb897 reintegrated the periodic neighbor packet worker, by
moving its logic into a `Future` implementation on `NetworkBridge` which
needs to be polled by its upper layer.

Polling by the upper layer was implemented within the `Future`
implementation of the `VoterWork` struct but not within the `Future`
implementation of the `ObserverWork` struct. This patch adds polling of
the `NetworkBridge` to the latter.