Update burble.dn42 servers and drone pipeline

.drone.yml

@@ -1,21 +1,40 @@
 ---
 kind: pipeline
-type: exec
+type: docker
 name: default
 
 steps:
  - name: build
+   image: golang
    environment:
      CGO_ENABLED: 0
    commands:
     - go build
 
- - name: stage
+ - name: upload
-   commands:
+   image: plugins/s3
-    - stage_artifact.sh dn42promsrv dn42promsrv
+   settings:
+     bucket: artifacts
+     access_key:
+       from_secret: MINIO_ACCESS_KEY
+     secret_key:
+       from_secret: MINIO_SECRET_KEY
+     endpoint: https://minio.burble.dn42
+     region: uk-lon3
+     path_style: true
+     source: dn42promsrv
+     target: /dn42promsrv/${DRONE_BRANCH}
 
- - name: promote
+---
-   commands:
+kind: secret
-    - promote_artifact.sh dn42promsrv
+name: MINIO_ACCESS_KEY
-   when:
+get:
-    branch: master
+  path: burble.dn42/kv/data/drone/minio
+  name: ACCESS_KEY
+
+---
+kind: secret
+name: MINIO_SECRET_KEY
+get:
+  path: burble.dn42/kv/data/drone/minio
+  name: SECRET_KEY

dns.go

@@ -114,14 +114,8 @@ var dns_servers = []*DNSServer{
 
 	&DNSServer{"burble.dn42", "burble", "de-fra1", 6,
 		"[fd42:4242:2601:3102:a25e:b7ff:feea:64ed]:53", 0},
-	&DNSServer{"burble.dn42", "burble", "us-dal3", 6,
-		"[fd42:4242:2601:2a02:a25e:b7ff:feea:64ed]:53", 0},
-	&DNSServer{"burble.dn42", "burble", "sg-sin2", 6,
-		"[fd42:4242:2601:3702:a25e:b7ff:feea:64ed]:53", 0},
 	&DNSServer{"burble.dn42", "burble", "ca-bhs2", 6,
 		"[fd42:4242:2601:2d02:a25e:b7ff:feea:64ed]:53", 0},
-	&DNSServer{"burble.dn42", "burble", "us-lax1", 6,
-		"[fd42:4242:2601:3a02:a25e:b7ff:feea:64ed]:53", 0},
 
 	// jrb0001