Fix for "return 202" not discarding body. Big POST (not fully preread) to a location / { return 202; } resulted in incorrect behaviour due to "return" code path not calling ngx_http_discard_request_body(). The same applies to all "return" used with 2xx/3xx codes except 201 and 204, and to all "return ... text" uses. Fix is to add ngx_http_discard_request_body() call to ngx_http_send_response() function where it looks appropriate. Discard body call from emtpy gif module removed as it's now redundant. Reported by Pyry Hakulinen, see http://mailman.nginx.org/pipermail/nginx/2011-August/028503.html

--- a/src/http/modules/ngx_http_empty_gif_module.c
+++ b/src/http/modules/ngx_http_empty_gif_module.c
@@ -111,19 +111,12 @@ static ngx_str_t  ngx_http_gif_type = ng
 static ngx_int_t
 ngx_http_empty_gif_handler(ngx_http_request_t *r)
 {
-    ngx_int_t                 rc;
     ngx_http_complex_value_t  cv;
 
     if (!(r->method & (NGX_HTTP_GET|NGX_HTTP_HEAD))) {
         return NGX_HTTP_NOT_ALLOWED;
     }
 
-    rc = ngx_http_discard_request_body(r);
-
-    if (rc != NGX_OK) {
-        return rc;
-    }
-
     ngx_memzero(&cv, sizeof(ngx_http_complex_value_t));
 
     cv.value.len = sizeof(ngx_empty_gif);