disable TRACE method

src/http/ngx_http_request.c

diff --git a/src/http/ngx_http_request.c b/src/http/ngx_http_request.c
index afc1d64..1a2e1bc 100644
--- a/src/http/ngx_http_request.c
+++ b/src/http/ngx_http_request.c
@@ -1267,6 +1267,13 @@
         return NGX_ERROR;
     }
 
+    if (r->method & (NGX_HTTP_TRACE)) {
+        ngx_log_error(NGX_LOG_INFO, r->connection->log, 0,
+                      "client sent TRACE method");
+        ngx_http_finalize_request(r, NGX_HTTP_NOT_ALLOWED);
+        return NGX_ERROR;
+    }
+
     if (r->headers_in.transfer_encoding
         && ngx_strstr(r->headers_in.transfer_encoding->value.data, "chunked"))
     {