Merge branch 'master' into t

* master:
  go/zodb: Prevent newly-created not-yet committed objects to go to ghost on deactivate
  go/zodb: Fix PActivate not to panic after an error
  go/zodb/fs1tools: Verify
  go/zodb/fs1tools: Dumper += DumpEndOK
  go/zodb: tests: Add a couple of missed t.Helper()
  go/zodb: tests: Teach tDB.Commit to return committed TID