Clay Gerrard b98fe3b77b Prefer X-Backend-Timestamp for X-Newest
When a X-Backend-Timestamp is available it would generally preferred
over a less specific value and sorts correctly against any X-Timestamp
values anyway.

Change-Id: I08b7eb37ab8bd6eb3afbb7dee44ed07a8c69b57e
2014-11-12 12:18:45 -08:00
..
2010-07-12 17:03:45 -05:00