### ClickHouse release v20.8.17.25-lts FIXME as compared to v20.8.16.20-lts

#### Bug Fix
* Backported in [#21341](https://github.com/ClickHouse/ClickHouse/issues/21341): Disable constant folding for subqueries on the analysis stage, when the result cannot be calculated. [#18446](https://github.com/ClickHouse/ClickHouse/pull/18446) ([Azat Khuzhin](https://github.com/azat)).
* Backported in [#22698](https://github.com/ClickHouse/ClickHouse/issues/22698): Fix wait for mutations on several replicas for ReplicatedMergeTree table engines. Previously, mutation/alter query may finish before mutation actually executed on other replicas. [#22669](https://github.com/ClickHouse/ClickHouse/pull/22669) ([alesapin](https://github.com/alesapin)).
* Backported in [#22737](https://github.com/ClickHouse/ClickHouse/issues/22737): Fix possible hangs in zk requests in case of OOM exception. Fixes [#22438](https://github.com/ClickHouse/ClickHouse/issues/22438). [#22684](https://github.com/ClickHouse/ClickHouse/pull/22684) ([Nikolai Kochetov](https://github.com/KochetovNicolai)).

#### Build/Testing/Packaging Improvement
* Backported in [#22819](https://github.com/ClickHouse/ClickHouse/issues/22819): Update timezones info to 2020e. [#18531](https://github.com/ClickHouse/ClickHouse/pull/18531) ([alesapin](https://github.com/alesapin)).
