Disable DNS cache for specific domains/regex

### Problem Description

I'd like to be able to disable cache replies for a specific domain/fqdn/regex, etc. Use case is that I have monitors setup to test DNS resolution times against my DNS servers (to identify spikes, issues, etc). 99% of queries come back near 0ms response time (since they are served from AGH cache). Then every so often, when the cache expires, I see spikes to 30ms, effectively making this monitor not terribly useful for external domains.

### Proposed Solution

I'd love to be able to see the ability to disable the AGH cache for a specific domain, a wildcard/regex, etc.