Previously, we would write out totals for every page of listings, like
$ swift list sync --prefix=09-21 --total -l
80000000000
80000000000
80000000000
58096000000
Now, roll those all into a single total:
$ swift list sync --prefix=09-21 --total -l
298096000000
Change-Id: Icc265636815220e33e8c9eec0a3ab80e9f899038