The module could send original URI “http://localhost/file/abcd.txt” to
backend to process.
And the module could get response from backend and decide to continue or
refuse.
But now This fix disabled sending original URI to backend.
*) Bugfix: a "proxy_pass" directive without URI part might use
original
request after redirection with the “try_files” directive.
If we need to send same request to backend, we must use named location.
But it
seems that named location is not support in subrequest. The named
location only
processed in try_files phase.
Following configuration would not work, for the subrequest send a
request “GET /dummy”
rather than original URI.