WAL-G 0.2.19 released

WAL-G team is happy to announce the release of WAL-G 0.2.19

WAL-G is an archival restoration tool for PostgreSQL (also for MySQL, MariaDB, SQL Server, FoundationDB, and MongoDB).

WAL-G releases can be [found here](https://github.com/wal-g/wal-g/releases/tag/v0.2.19)

Notable changes in this release include:

1. Fixes for S3 and GCP storages [#656](https://github.com/wal-g/wal-g/issues/656) [#756](https://github.com/wal-g/wal-g/issues/756).
2. Add wal-show command to get information about WAL storage folder.
3. Add wal-verify command. It checks the integrity of WAL history starting from the oldest backup available in current timeline history.
4. Add wal-receive command. You can use WAL-G as a replica running on another host to ensure RPO=0. This is beta functionality: API may change in the future.
5. Add reverse delta unpack for backup-fetch (--reverse-unpack flag).
6. Add redundant archives skipping for backup-fetch (--skip-redundant-tars flag, designed to work in pair with reverse delta unpack).
7. Add page checksum verification for backup-push (--verify flag).

You can find more about some of these new features in [Daniil Zakhlystov's post about his GSoC](https://usernamedt.me/google-summer-of-code-2020-at-postgresql/).

Thanks!

Best regards, Andrey Borodin.