Print a web link: the device process fetches it bounded, never inside the mesh or the machine, stores it under its SHA-256 and prints that (issue 1599)

modules/brother/module.json

@@ -219,6 +219,14 @@
       "mode": "0644",
       "template": "files/bucket.json"
     },
+    {
+      "id": "fetch",
+      "type": "file",
+      "path": "${dir:state}/fetch.json",
+      "owner": "brother-device",
+      "mode": "0600",
+      "template": "files/fetch.json"
+    },
     {
       "id": "device",
       "type": "process",
@@ -233,11 +241,13 @@
         "BROTHER_SETTINGS": "${dir:state}/settings.json",
         "BROTHER_ADMIN_PASSWORD": "${dir:state}/admin-password.secret",
         "BROTHER_BROKER": "${dir:state}/broker-device.secret",
-        "BROTHER_STORE": "${dir:state}/store.json"
+        "BROTHER_STORE": "${dir:state}/store.json",
+        "BROTHER_FETCH": "${dir:state}/fetch.json"
       },
       "restart-on": [
         "settings",
-        "store"
+        "store",
+        "fetch"
       ],
       "bus": {
         "queues": [