fix request counter for X-Accel-Redirect, the bug was introduced in r3050

src/http/ngx_http_upstream.c

diff --git a/src/http/ngx_http_upstream.c b/src/http/ngx_http_upstream.c
index 5186b80..380b3c2 100644
--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -1815,6 +1815,7 @@
         r->valid_unparsed_uri = 0;
 
         ngx_http_internal_redirect(r, uri, &args);
+        ngx_http_finalize_request(r, NGX_DONE);
         return NGX_DONE;
     }