* stable-3.1:
Update replication plugin to get fixes for CI flakiness
Use consistent capitalization for term NoteDb in documentation
Hide refs/meta/config on git protocol v2
GitProtocolV2IT: Split git client version check to a separate method
CreateTag: Trim revision that is provided in input
CreateTag: Allow revision in input to be empty
RefUtil#parseBaseRevision: Do not log an error if baseRevision is invalid
InvalidRevisionException: Include invalid revision into message
CreateBranch: Trim revision that is provided in input
CreateBranch: Allow revision in input to be empty
CreateBranchIT: Add tests that set revision in the input
Upgrade gitiles blame-cache to 0.2-7.1
GitProtocolV2IT: Fail if git client is too old to support v2
Document how to backup Gerrit
Update rules_closure to latest version
Change-Id: Ic2efebe3a1379f5c7c642b152b4fec78e1cbcb47
4113e4f86c