Added changes for 3.34 release.
Added changes for 3.34 release.

BrandonY/gsutil,GoogleCloudPlatform/gsutil,GoogleCloudPlatform/gsutil,dtjackson/gsutil,mattdr/gsutil,ttiurani/gsutil,dimfeld/gsutil,craigcitro/gsutil,chriskuehl/gsutil-debian,fishjord/gsutil