Merge pull request #24510 from pritha-srivastava/wip-sts-buffer-overflow

rgw: Fix for buffer overflow in STS op_post().

Reviewed-by: Casey Bodley <cbodley@redhat.com>
Reviewed-by: Matt Benjamin <mbenjami@redhat.com>
Reviewed-by: Adam C. Emerson <aemerson@redhat.com>

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

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

diff --cc src/rgw/rgw_rest_s3.cc
Simple merge

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