dnscontrol: update docker

Author: zowoq

dnscontrol/dnsconfig.js

@@ -57,7 +57,7 @@ var cnames = {
     "build-box": "build01",
     "buildbot": "build03",
     "darwin-build-box": "darwin01",
-    "docker": "zimbatm.docker.scarf.sh.", // Used by nix-community/nixpkgs-docker
+    "docker": "nix-community.docker.scarf.sh.", // Used by nix-community/nixpkgs-docker
     "hydra": "build03",
     "landscape": "web01",
     "nixpkgs-update-cache": "build02",