removed the limitation that we cannot capture subrequests with internal redirects from the doc.
removed the limitation that we cannot capture subrequests with internal redirects from the doc.

yeahdongcn/SEnginx,yeahdongcn/SEnginx,yeahdongcn/SEnginx,yeahdongcn/SEnginx,yeahdongcn/SEnginx,yeahdongcn/SEnginx,yeahdongcn/SEnginx