Merge pull request #9188 from rzarzynski/wip-rgw-swift-versioning-new-2

rgw: improve support for Swift's object versioning.
Reviewed-by: Orit Wasserman <owasserm@redhat.com>

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

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

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

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

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

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