Merge pull request #21026 from ivancich/wip-rgw-unordered-listing

rgw: ability to list bucket contents in unsorted order for efficiency

Reviewed-by: Matt Benjamin <mbenjamin@redhat.com>

diff --cc src/rgw/rgw_admin.cc
Simple merge

diff --cc src/rgw/rgw_op.cc
Simple merge

diff --cc src/rgw/rgw_rados.cc
Simple merge

diff --cc src/rgw/rgw_rados.h
Simple merge