Merge pull request #10280 from rzarzynski/wip-rgw-swift-at-root-features

rgw: add suport for Swift-at-root dependent features of Swift API

Reviewed-by: Casey Bodley <cbodley@redhat.com>
Reviewed-by: Pritha Srivastava <prsrivas@redhat.com>
Reviewed-by: Radoslaw Zarzynski <rzarzynski@mirantis.com>

diff --cc doc/radosgw/config-ref.rst
Simple merge

diff --cc src/common/config_opts.h
Simple merge

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

diff --cc src/rgw/rgw_main.cc
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_rest.cc
Simple merge

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

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