Log Message:
py-gsutil: updated to 4.34

Release 4.34:

New features
- Added bucket lock support to gsutil. Currently, your project must be
  whitelisted for use with the new bucket lock functionality. This restriction
  will be lifted in the near future.

Bug Fixes
- Fixed issue where "rsync -P" would fail if run as the root user.
- Fixed an issue with credential caching where the source credentials for an
  entity would change but the old cached credentials would still be used.

Other Changes
- OAuth2 token exchanges now go to https://oauth2.googleapis.com/token instead
  of https://accounts.google.com/o/oauth2/token. Users using gsutil behind a
  firewall may need to adjust their firewall rules.
- If invoked via the Cloud SDK, gsutil's debug output now displays the path to
  gcloud's gsutil wrapper script for "gsutil path", rather than the \ 
actual entry
  point for the bundled gsutil component.
- Improved error messages for failed Cloud KMS requests.
- Improved error messages for "iam ch" command to clarify that assigning
  roles to project convenience groups (e.g. "projectEditor") is not \ 
allowed.
- Enhanced perfdiag command to include GCE instance details (if applicable)
  and the target bucket's location and storage class.
- Several documentation updates and clarifications.