LFNIndex: Add support generating keyed hobject_t filenames
LFNIndex: Add support generating keyed hobject_t filenames

LFNIndex will now include the key in the filename.

Signed-off-by: Samuel Just <4c46b94684b338bae1ed5e7e1321718dd75401cc@dreamhost.com>

ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph