Fixing NAPTR support (kubernetes-sigs#3979)

Author: jstudler

source/crd.go

@@ -190,7 +190,10 @@ func (cs *crdSource) Endpoints(ctx context.Context) ([]*endpoint.Endpoint, error
 
 			illegalTarget := false
 			for _, target := range ep.Targets {
-				if strings.HasSuffix(target, ".") {
+				if ep.RecordType != "NAPTR" && strings.HasSuffix(target, ".") {
+					illegalTarget = true
+					break
+				} else if ep.RecordType == "NAPTR" && !strings.HasSuffix(target, ".") {
 					illegalTarget = true
 					break
 				}