Log Message:
Update py-gsutil to 4.45, now with Python 3 support!

Release 4.45 (release date: 2019-10-18)
=======================================
Bug Fixes
------------------
 - Fixed exception when using CMEK with resumable uploads.
 - Fixed alias for new ubla command.
 - Fixed default RDNS behavior for backwards compatibility with 4.42 and earlier.

Other Changes
------------------
- Improvements to continuous integration workflow.

Release 4.44 (release date: 2019-10-02)
=======================================
New Features
------------------
- Added support for service account impersonation through a new `-i` option to
  specify a service account to impersonate.
- Added support for members using the deleted syntax (i.e. `deleted:user:...`,
  `deleted:group:...`, `deleted:serviceAccount:...`).
- Added support for the new uniform bucket-level access (`ubla`) command
  (currently an alias of `bucketpolicyonly`).
- Added `-w` flag to `kms` command, which shows a warning rather than failing
  when updating key permissions does not succeed.

Bug Fixes
------------------
- Fixed regression in cp where a statement like
  `cp my-file gs://my-bucket/non-existent-folder/` would create a file called
  `non-existent-folder` rather than `non-existent-folder/my-file`.
- Fixed streaming uploads for Python 3.

Release 4.43 (release date: 2019-09-20)
=======================================
New Features
------------------
- Added support for socks proxies, including socks4 and socks5.

Bug Fixes
------------------
- Fixed cp/mv errors that occur when  destination directory is a substring of
  another directory. Behavior now more closely matches OS cp/mv commands.
- Fixed issue where set IAM policy on objects threw errors.
- Fixed issue when showing help in a pager in Python 3 environments.

Other Changes
------------------
- Several documentation updates and clarifications.

Release 4.42 (release date: 2019-08-05)
=======================================
 Bug Fixes
------------------
- Fixed some text encoding/decoding issues in certain Python 3 environments.
- Fixed issue where bundled crcmod for macOS could not be imported and would
  crash gsutil on Python 3.
- Fixed issue where trying to run gsutil on an unsupported version of Python 3
  (3.4 or below) would crash instead of presenting an informative error.

Other Changes
------------------
- Several documentation updates and clarifications.

Release 4.41 (release date: 2019-07-16)
=======================================
New Features
------------------
- Added HMAC key management for service accounts. This includes a new \ 
"hmac"
  command to create/get/list/update/delete HMAC keys on service accounts.
  Currently, your project must be whitelisted for use with this new HMAC
  functionality. This restriction will be lifted in the near future.

 Bug Fixes
------------------
- Fixed bug where copying files > 100MiB from GCS to S3 was hanging.
- Fixed issue where content type was sometimes set improperly.

Release 4.40 (release date: 2019-07-01)
=======================================
New Features
------------------
- Added support for running gsutil on Python 3.5+. Python 2 will reach its EOL
  (End of Life) on Jan. 1, 2020, and gsutil will stop supporting Python 2.7 at
  some point afterward (TBD).

 Bug Fixes
------------------
- Fixed bug introduced in v4.39 where rsync would not correctly sync object/file
  names containing some special URL-encodable characters (e.g. "+" and
  whitespace characters).
- Fixed the update command so that it no longer fails when it detects the
  presence of additional top-level files that were added in the v4.39 release.

 Other Changes
------------------
- Several documentation updates and clarifications.

Release 4.39 (release date: 2019-06-13)
=======================================
New Features
------------------
- Compression level is now configurable by setting "gzip_compression_level"
  under the "GSUtil" section in the boto config file. The default \ 
value is 9.

 Bug Fixes
------------------
- Fixed bug where IAM operations failed on buckets whose names lacked any
  letters.

 Other Changes
------------------
- Revised contribution guidelines to direct developers to submit GitHub pull
  requests instead of using the Rietveld code review tool.
- Several code changes to work toward Python 3 support (coming in a subsequent
  release).
- Several documentation and command help improvements.
- Various improvements to test stability and feedback.

Release 4.38 (release date: 2019-03-25)
=======================================
Bug Fixes
------------------
- Fixed issue where multiprocessing check would raise an exception if
  /etc/os-release was not in the expected format.

Other Changes
------------------
- Improved error message for trying to retrieve default object ACLs on a bucket
  with Bucket Policy Only enabled.
- When running "gsutil -D rsync ..." and encountering an error listing \ 
local
  files, gsutil will now print a stack trace as debug-level output.
- Several documentation updates and clarifications.

Release 4.37 (release date: 2019-02-26)
=======================================
Bug Fixes
------------------
- Fixed a bug where XML API requests would sometimes fail with SSLError
  exceptions due to SNI not being used for https connections.
- Fixed "du" output spacing for 6-digit sizes.

Other Changes
------------------
- Updated crcmod installation instructions for CentOS 6.

Release 4.36 (release date: 2019-01-28)
=======================================
New features
------------------
- Added Bucket Policy Only support to gsutil. This includes a new
  "bucketpolicyonly" command to get/set BPO on existing buckets, as \ 
well adding
  the ability to set BPO at bucket creation time with "mb -b". \ 
Currently, your
  project must be whitelisted for use with the new BPO functionality. This
  restriction will be lifted in the near future.

Bug Fixes
------------------
- Fixed a bug where "cp -n" would overwrite a local file at the \ 
destination if
  its size differed from the source's size.

Other Changes
------------------
- Updated crcmod installation instructions for enterprise SUSE systems.

Release 4.35 (release date: 2018-12-18)
=======================================
New features
------------------
- Added -u option to rsync; this will skip copying files/objects that are newer
  (as determined by checking mtime) at the destination.

Bug Fixes
------------------
- The "iam ch" command now allows supplying custom IAM roles.
- Fixed an issue where debug output was not displaying all of the loaded config
  files under the "config path(s)" label.
- Disabled running with multiple processes when running on Alpine Linux, as this
  would sometimes cause gsutil to hang forever. Running with multiple threads is
  still allowed.
- The "rsync" command now prints log messages during synchronization \ 
to indicate
  when symlinks are being skipped.
- The "Boto:ca_certificates_file" config option can now be overridden using
  the -o option.

Other Changes
------------------
- Disallowed installing gsutil on Python versions != 2.7.
- Several documentation updates and clarifications.