tree 7197ea1fbae08d8afe40c55dc994dab4d2117115
parent df418f2e61278addcc4988bd5c0b485b465f29f0
author Ruslan Ermilov <ru@nginx.com> 1499183441 +0300
committer Ruslan Ermilov <ru@nginx.com> 1499183441 +0300

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.