Allow a node to declare settings that should be exported

nodes/core/io/21-httprequest.js

@@ -216,6 +216,14 @@ module.exports = function(RED) {
         credentials: {
             user: {type:"text"},
             password: {type: "password"}
+        },
+        settings: {
+            httpRequestColour: {
+                value: "red",
+                // validate: function(v) { return IT MUST BE A NUMBER },
+                // required: false,
+                exportable: true
+            }
         }
     });
 }