* In progress, runtime io must switch to future proof root +
child_specific (unique id) + u32 type.

* Switch interface, sr-io seems ok, rpc could use similar interface to
sr-io, genesis json broken if there is child trie in existing encoding
genesis.

* test from previous implementation.

* fix proving test.

* Restore Keyspacedb from other branch, only apply to child trie.

* Removing unneeded child_info from child root (child info are stored
if things changed, otherwhise the root does not change).

* Switch rpc to use same format as ext: more future proof.

* use root from child info for trie backend essence.

* Breaking long lines.

* Update doc and clean pr a bit.

* fix error type

* Restore removed doc on merge and update sr-io doc.

* Switch child storage api to use directly unique id, if managed id
where to be put in place, the api will change at this time.

* Clean deprecated host interface from child.

* Removing assertion on child info (can fail depending on root
memoization).

* merging child info in the overlay when possible.

* child iteration by prefix using child_info.

* Using ChainInfo in frame support. ChainInfo gets redesign to avoid
buffers allocation on every calls.

* Add length of root to the data of child info.

* comments

* Encode compact.

* Remove child info with root.

* Fix try_update condition.

* Comment Ext child root caching.

* Replace tuples by struct with field

* remove StorageTuple alias.

* Fix doc tests, and remove StorageOverlay and ChildStorageOverlay
aliases.

* update comments in authority discovery

* Update lib.rs

* Allow owner of a preimage to reap it a little while before everyone else.

* Revamp DispatchQueue to make reaping safer

* Remove commented code

* Update frame/democracy/src/lib.rs

Co-Authored-By: Shawn Tabrizi <[email protected]>

* Update docs

* client/rpc/api -> client/rpc-api

* client/util/wasm-builder-runner -> utils/wasm-builder-runner

* client/grafana-data-source -> utils/grafana-data-source

* test/utils -> test-utils

* fix moved path

* Update Cargo.lock

* Update Cargo.lock

* Allow referendums to begin out of order

* Make `inject_referendum` infallible

* Merge remote-tracking branch 'origin/gav-verified-id' into gav-verified-id

# Conflicts:
#	frame/identity/src/lib.rs

* Renames.

* Fix token economics url.

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

* sr-arithmetic -> arithmetic

* sr-sandbox -> sandbox

* primitives/sr-staking-primitives -> primitives/staking

* primitives/sr-version -> primitives/version

* primitives/block-builder/runtime-api -> primitives/block-builder

* move application-crypto tests into seperate crate

* Fix crate name, update script and add docs

* pressing 'save' helps

* remove useless lines

* adding header

* split into actual modules

* move benches into tests, ignore non-passing doctests

* Rename sr-api folder

* Move test-primitives to primitives, use that for sp-api doctests

* primitives/sr-io -> primitives/io

* fix

* rename

* runtime-io -> sp-io

* git mv

* fix ci

* remove package name

* fix

* fix

* try minimizing diff

* try minimizing diff again

* try minimizing diff again

* Remove warnings when compiling runtime.

* Remove dispatch::Result imports.

* Add missing imports.

* Fix missing vecs. #4333

* Fix oom function.

* Remove superfluous import.

* More warnings.

* primitives/sr-std -> primitives/std

* fix

* fix conflict

* rstd -> sp-std

* git mv

* fix review

* fix merge

* Introduce storage_next allowing iteration.  (without childtries)

* Implement prefixed storage

* impl cache in client_storage_cache (needs test)

* switch overlay change to btreemap

* Revert "impl cache in client_storage_cache"

This reverts commit c91a4848916eba87184b3dc4722cea81aec9339d.

the storage cache cannot be used this way

* Revert "Implement prefixed storage"

This reverts commit 4931088126a427082d7310ed7e83b8eea966bc20.

* Impl StoragePrefixedMap for all map storages

* remove comment

* Move all overlays to BTreeMap

* btreemap iteration improvment

* impl for child tries

* impl tests for childs

* fix

* remove cache comment

* Fix grumble

* Limit number of uncles that can be provided.

* Check length of uncles vector on inherent.

* Set fatal error to true for too many uncles.

* Take max uncles in create_inherent.

* Initial prototype

* Work on test harness.

* Minor removal

* Add some tests

* Fix tests

* More tests

* Final tests

* General documentation

* Function-level docs.

* Function-level docs.

* Identity fields.

* Fix dependency

* Docs

* Spelling nits

* Address grumbles.

* primitives/sr-primitives -> primitives/runtime

* update

* Use balance capped to u64

* Add debug.

* Expose some of session's storage as public, as well as set_keys

Seemingly there's no reason not to do this, as anyone can always do
it the "hard way" by constructing storage keys or extrinsics.

* Use trait to expose `is_registered` function

* Missed removing a pub keyword

* Move trait to support, add docstrings

* pallet-evm: weight calculation for call/create based on gas provided

* Update frame/evm/src/lib.rs

Co-Authored-By: Niklas Adolfsson <[email protected]>

* Rename generate_extrinsics to offchain_worker

* Some doc improvements.

* Another fix for elections phragmen

CC @Kianenigma

* Test for correct sorting.

CC @Kianenigma

* Add `swap` and `decode_len` to `DoubleMap`

*  Add tests to `swap` and `decode_len` for `DoubleMap` (WIP)

* Address review comments

* Remove function that is not in scope

* fix test

* better naming

* Adding script for rename, could be applicable for nodes on top of it, too

* add stderr and gitlab ci features

* apply script

* fix now minor details in expected stderr

* Update the Cargo.lock

* fix name: sc-transaction -> sc-tracing

* fix rename in script, too

* Introduce `VestingCurrency` trait

* Return error if account already has vesting schedule

* Fix up `end_block` mess; add free preimage noting for imminents.

* Fixes

* Bump runtime

* Update frame/democracy/src/lib.rs

Co-Authored-By: Shawn Tabrizi <[email protected]>

* Handle grumble

* Update frame/democracy/src/lib.rs

Co-Authored-By: Shawn Tabrizi <[email protected]>

* Use Weight instead of u32 everywhere

* Revert Weight declaration

* Fix benches