NGX_HTTP_REQUEST_BODY_FILE_CLEAN  102 http/ngx_http_core_module.c     { ngx_string("clean"), NGX_HTTP_REQUEST_BODY_FILE_CLEAN },
NGX_HTTP_REQUEST_BODY_FILE_CLEAN 1413 http/ngx_http_core_module.c             clcf->client_body_in_file_only == NGX_HTTP_REQUEST_BODY_FILE_CLEAN;