Static large object support.

Also fixed bug with current large objects with segment listing prefixes.

Allow retry for object PUTs when possible.

Change-Id: I0edff127fd5d5c53da33aa7cb76a4f4dc85bf6e6
Improve auth option help

Add to the help strings to clarify the need for --os-auth-token to
also have --os-storage-url supplied.

Change-Id: I6a7259c38ce01813ae96f307efaf46e7863bd223
Merge "Static large object support."