mw/kubernetes: remove federation and cidr (#916)

* 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

1 files changed, 0 insertions, 12 deletions

diff --git a/middleware/kubernetes/reverse.go b/middleware/kubernetes/reverse.go
index 3edb026f8..b7392343d 100644
--- a/middleware/kubernetes/reverse.go
+++ b/middleware/kubernetes/reverse.go
@@ -1,8 +1,6 @@
 package kubernetes
 
 import (
-	"net"
-
 	"github.com/coredns/coredns/middleware"
 	"github.com/coredns/coredns/middleware/etcd/msg"
 	"github.com/coredns/coredns/middleware/pkg/dnsutil"
@@ -20,13 +18,3 @@ func (k *Kubernetes) Reverse(state request.Request, exact bool, opt middleware.O
 	records := k.getServiceRecordForIP(ip, state.Name())
 	return records, nil, nil
 }
-
-func (k *Kubernetes) isRequestInReverseRange(name string) bool {
-	ip := dnsutil.ExtractAddressFromReverse(name)
-	for _, c := range k.ReverseCidrs {
-		if c.Contains(net.ParseIP(ip)) {
-			return true
-		}
-	}
-	return false
-}