rename ngx_http_discard_body() to ngx_http_discard_request_body()

src/http/modules/ngx_http_flv_module.c

diff --git a/src/http/modules/ngx_http_flv_module.c b/src/http/modules/ngx_http_flv_module.c
index 6fda6ba..e1bec8b 100644
--- a/src/http/modules/ngx_http_flv_module.c
+++ b/src/http/modules/ngx_http_flv_module.c
@@ -89,7 +89,7 @@
         return NGX_DECLINED;
     }
 
-    rc = ngx_http_discard_body(r);
+    rc = ngx_http_discard_request_body(r);
 
     if (rc != NGX_OK && rc != NGX_AGAIN) {
         return rc;