tree abd33cdb8309fa0dfbb1ecdb9de889d57a5a5cfe
parent 569a27a740495ba801d526b3954bfac3692d78c0
author David Ostrovsky <david@ostrovsky.org> 1618472065 +0200
committer David Ostrovsky <david@ostrovsky.org> 1618840798 +0200

Correct statement about schema changes for 3.4 release

Also add Zero-downtime upgrade and Downgrade sections.

Change-Id: I52ac3e41332c055888154a08bb48bdc88942af0c