* mw/kubernetes: remove federation and cidr
Remove both as we have a corefile syntax change that handles cidr and
remove federation because that is going to be its own middleware.
* backwards incompat changes
This PR:
* removes cidr from kubernetes (core Corefile feature now)
* removes federation from kubernets (comes back as new middleware)
* [remove autopath - which was already gone, so that already was
backwards incompat]
* adds `fallthrough` to the *etcd* middleware and makes you enable it.
* Fail on unknown properties
* documentation
* Disable TestHealthCheck as it uses realtime and fails
Add some docs about normalize.Host and normalize.Name. They are used
correctly in the middleware even though they are somewhat confusing,
esp when you copy from ServerBlockKeys in your middleware.
* add hosts middleware
* forgot pointer receiver
* add appropriately modified hostsfile tests from golang repo
* remove test artifacts, separate hostsfile parsing from caching and opening, remove unused metrics references, move middleware up the chain
* refactored the logic for creating records and filtering ip address versions. also got PTR lookups working
* Add README.md. Modify config to be more concise. Add zones list to config. Filter PTR responses based on zones list.
* add Fallthrough and return correct dns response code otherwise
* Simplified Hostsfile to only store hosts in the zones we care about, and by ip version. Added handler tests and improved other tests.
* oops, goimports loaded a package from a different repo
