Resolver: cancelable resend timer event. It is safe because re-sending still works during graceful shutdown as long as resolving takes place (and resolve tasks set their own timeouts that are not cancelable). Also, the new ctx->cancelable flag can be set to make resolve task's timeout event cancelable.

// Copyright (C) Igor Sysoev
// Copyright (C) Nginx, Inc.


nginx   icon  discardable  "src\\os\\win32\\nginx.ico"