* Remove master from versions and copy it from the latest. (#7980)

(cherry picked from commit f939f962b1)

There are a lot of existing links to the master section of the site, and my
attempts to get a redirector working have so far not succeeded. While it still
makes sense to not publish docs for unreleased code, a 404 is almost certainly
more disruptive than seeing docs for unreleased stuff.

This includes the docs in the build again, but does not add them back to the
selector menu. That allows URLs to resolve but encourages folks to use the
released versions when they have a choice.

I left the redirect for the RPC link in place, since that's still useful.

Updates #7935.

(cherry picked from commit 926c469fcc)

Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

The various package locks got out of sync, reunify them.

* docs: redirect master links to the latest release version (#7936)

(cherry picked from commit 70ee282d9e)

Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

* docs: Pin the RPC docs to v0.35 instead of master (#7909)

(cherry picked from commit 3b20931da3)

Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

* Remove master from the docs site version config. (#7874)

(cherry picked from commit 351adf8ddb)

Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

When testing rollback feature in the Cosmos SDK, we found that the app hash
in Tendermint after rollback was the value after the latest block, rather than
before it.

Co-authored-by: Callum Waters <cmwaters19@gmail.com>
Co-authored-by: yihuang <huang@crypto.com>

(cherry picked from commit 8a238fdcb4)

Inline factory function that does not exist in this branch.

Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

* consensus: check proposal non-nil in prevote message delay metric (#7625)

(cherry picked from commit b6307c42e0)

# Conflicts:
#	consensus/state.go

* fix merge conflicts

Co-authored-by: William Banfield <4561443+williambanfield@users.noreply.github.com>
Co-authored-by: William Banfield <wbanfield@gmail.com>

* consensus: calculate prevote message delay metric (#7551)

## What does this pull request do?
This pull requests adds two metrics intended for use in calculating an experimental value for `MessageDelay`.

The metrics are as follows:
```
# HELP tendermint_consensus_complete_prevote_message_delay Difference in seconds between the proposal timestamp and the timestamp of the prevote that achieved 100% of the voting power in the prevote step.
# TYPE tendermint_consensus_complete_prevote_message_delay gauge
tendermint_consensus_complete_prevote_message_delay{chain_id="test-chain-aZbwF1"} 0.013025505

# HELP tendermint_consensus_quorum_prevote_message_delay Difference in seconds between the proposal timestamp and the timestamp of the prevote that achieved a quorum in the prevote step.
# TYPE tendermint_consensus_quorum_prevote_message_delay gauge
tendermint_consensus_quorum_prevote_message_delay{chain_id="test-chain-aZbwF1"} 0.013025505
```

## Why this change?

 For more information on what these metrics are calculating, see #7202. The aim is to merge to backport these metrics to v0.34 and run nodes on a few popular chains with these metrics to determine the experimental values for `MessageDelay` on these popular chains and use these to select our default `SynchronyParams.MessageDelay` value.

## Why Gauges for the metrics?
Gauges allow us to overwrite the metric on each successive observation. We can then capture these metrics over time to track the highest and lowest observed value.

(cherry picked from commit 0c82ceaa5f)

# Conflicts:
#	consensus/metrics.go
#	consensus/state.go

* fix merge conflicts

Co-authored-by: William Banfield <4561443+williambanfield@users.noreply.github.com>
Co-authored-by: William Banfield <wbanfield@gmail.com>

Bumps [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang) from 1.11.0 to 1.12.0.
- [Release notes](https://github.com/prometheus/client_golang/releases)
- [Changelog](https://github.com/prometheus/client_golang/blob/main/CHANGELOG.md)
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Bumps [github.com/rs/cors](https://github.com/rs/cors) from 1.8.0 to 1.8.2.
- [Release notes](https://github.com/rs/cors/releases)
- [Commits](https://github.com/rs/cors/compare/v1.8.0...v1.8.2)

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* reduce some logs

* reduce error logs

* remove debug

Bumps [github.com/spf13/viper](https://github.com/spf13/viper) from 1.10.0 to 1.10.1.
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* build(deps): Bump google.golang.org/grpc from 1.42.0 to 1.43.0

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.42.0 to 1.43.0.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](https://github.com/grpc/grpc-go/compare/v1.42.0...v1.43.0)

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Bumps [github.com/spf13/cobra](https://github.com/spf13/cobra) from 1.2.1 to 1.3.0.
- [Release notes](https://github.com/spf13/cobra/releases)
- [Changelog](https://github.com/spf13/cobra/blob/master/CHANGELOG.md)
- [Commits](https://github.com/spf13/cobra/compare/v1.2.1...v1.3.0)

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Bumps [github.com/adlio/schema](https://github.com/adlio/schema) from 1.2.2 to 1.2.3.
- [Release notes](https://github.com/adlio/schema/releases)
- [Commits](https://github.com/adlio/schema/compare/v1.2.2...v1.2.3)

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Bumps [github.com/spf13/viper](https://github.com/spf13/viper) from 1.9.0 to 1.10.0.
- [Release notes](https://github.com/spf13/viper/releases)
- [Commits](https://github.com/spf13/viper/compare/v1.9.0...v1.10.0)

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* build(deps): Bump github.com/adlio/schema from 1.1.15 to 1.2.2

Bumps [github.com/adlio/schema](https://github.com/adlio/schema) from 1.1.15 to 1.2.2.
- [Release notes](https://github.com/adlio/schema/releases)
- [Commits](https://github.com/adlio/schema/compare/v1.1.15...v1.2.2)

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* Update usage of Migrator API.

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

Bumps [github.com/adlio/schema](https://github.com/adlio/schema) from 1.1.14 to 1.1.15.
- [Release notes](https://github.com/adlio/schema/releases)
- [Commits](https://github.com/adlio/schema/compare/v1.1.14...v1.1.15)

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Per https://docs.mergify.com/actions/merge/#commit-message, the
commit_message option is deprecated and will be removed in 2022.
Replace it with the template suggested here:

https://docs.mergify.com/actions/queue/

(cherry picked from commit 02d456b8b8)

Per https://blog.mergify.com/strict-mode-deprecation/, the strict mode
has been deprecated and will be turned off on 10-Jan-2022. This updates
the config to use the new, approved thing instead of the old thing.

(cherry picked from commit 2d4844f97f)

* cmd: add integration test and fix bug in rollback command (#7315)

(cherry picked from commit bca2080c01)

Co-authored-by: Callum Waters <cmwaters19@gmail.com>

If a subscriber arrives while the pubsub service is shutting down, the existing
code will return a nil subscription without error. With unlucky timing, this
may lead to a nil indirection panic in the RPC service.

To avoid that problem, make sure that when a subscription fails for this
reason, we report a non-nil error so that the client will detect it and give up
gracefully.

Bumps [github.com/tendermint/tm-db](https://github.com/tendermint/tm-db) from 0.6.4 to 0.6.6.
- [Release notes](https://github.com/tendermint/tm-db/releases)
- [Changelog](https://github.com/tendermint/tm-db/blob/master/CHANGELOG.md)
- [Commits](https://github.com/tendermint/tm-db/compare/v0.6.4...v0.6.6)

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A workaround for #6729. Add parameters to control buffer sizes for
event subscription RPC clients. On some networks, buffering causes
clients to be dropped and/or events to be lost.

For additional context, see the discussion on #7188.

- Add experimental_subscription_buffer_size config parameter
- Add experimental_websocket_write_buffer_size config parameter
- Add experimental_close_on_slow_client config parameter

Co-authored-by: M. J. Fromberger <fromberger@interchain.io>

* build(deps): Bump github.com/go-kit/kit from 0.10.0 to 0.12.0

Bumps [github.com/go-kit/kit](https://github.com/go-kit/kit) from 0.10.0 to 0.12.0.
- [Release notes](https://github.com/go-kit/kit/releases)
- [Commits](https://github.com/go-kit/kit/compare/v0.10.0...v0.12.0)

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* add nolint

* fix lint

* fix build

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: tycho garen <garen@tychoish.com>

* build(deps): Bump github.com/spf13/viper from 1.7.1 to 1.9.0

Bumps [github.com/spf13/viper](https://github.com/spf13/viper) from 1.7.1 to 1.9.0.
- [Release notes](https://github.com/spf13/viper/releases)
- [Commits](https://github.com/spf13/viper/compare/v1.7.1...v1.9.0)

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* add nolint

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* build(deps): Bump google.golang.org/grpc from 1.38.0 to 1.42.0

Bumps [google.golang.org/grpc](https://github.com/grpc/grpc-go) from 1.38.0 to 1.42.0.
- [Release notes](https://github.com/grpc/grpc-go/releases)
- [Commits](https://github.com/grpc/grpc-go/compare/v1.38.0...v1.42.0)

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* Fix Unix-domain socket paths.

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: M. J. Fromberger <fromberger@interchain.io>
Co-authored-by: tycho garen <garen@tychoish.com>

Bumps [github.com/minio/highwayhash](https://github.com/minio/highwayhash) from 1.0.1 to 1.0.2.
- [Release notes](https://github.com/minio/highwayhash/releases)
- [Commits](https://github.com/minio/highwayhash/compare/v1.0.1...v1.0.2)

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Bumps [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang) from 1.8.0 to 1.11.0.
- [Release notes](https://github.com/prometheus/client_golang/releases)
- [Changelog](https://github.com/prometheus/client_golang/blob/master/CHANGELOG.md)
- [Commits](https://github.com/prometheus/client_golang/compare/v1.8.0...v1.11.0)

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Bumps [github.com/Workiva/go-datastructures](https://github.com/Workiva/go-datastructures) from 1.0.52 to 1.0.53.
- [Release notes](https://github.com/Workiva/go-datastructures/releases)
- [Commits](https://github.com/Workiva/go-datastructures/compare/v1.0.52...v1.0.53)

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Bumps [github.com/BurntSushi/toml](https://github.com/BurntSushi/toml) from 0.3.1 to 0.4.1.
- [Release notes](https://github.com/BurntSushi/toml/releases)
- [Commits](https://github.com/BurntSushi/toml/compare/v0.3.1...v0.4.1)

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Bumps [github.com/btcsuite/btcd](https://github.com/btcsuite/btcd) from 0.21.0-beta to 0.22.0-beta.
- [Release notes](https://github.com/btcsuite/btcd/releases)
- [Changelog](https://github.com/btcsuite/btcd/blob/master/CHANGES)
- [Commits](https://github.com/btcsuite/btcd/compare/v0.21.0-beta...v0.22.0-beta)

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Bumps [github.com/rs/cors](https://github.com/rs/cors) from 1.7.0 to 1.8.0.
- [Release notes](https://github.com/rs/cors/releases)
- [Commits](https://github.com/rs/cors/compare/v1.7.0...v1.8.0)

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