sketch out metadata commands for allow lists

lib/metadata.js

@@ -19,6 +19,19 @@ var isValidOwner = function (owner) {
     return typeof(owner) === 'string' && owner.length === 44;
 };
 
+// ["RESTRICT_ACCESS", [true], 1561623438989]
+// ["RESTRICT_ACCESS", [false], 1561623438989]
+// commands.RESTRICT_ACCESS = function (meta, args) {};
+
+// ["ADD_ALLOWED", ["7eEqelGso3EBr5jHlei6av4r9w2B9XZiGGwA1EgZ-5I=", ...], 1561623438989]
+// commands.ADD_ALLOWED = function (meta, args) {};
+
+// ["RM_ALLOWED", ["7eEqelGso3EBr5jHlei6av4r9w2B9XZiGGwA1EgZ-5I=", ...], 1561623438989]
+// commands.RM_ALLOWED = function (meta, args) {};
+
+// ["RESET_ALLOWED", ["7eEqelGso3EBr5jHlei6av4r9w2B9XZiGGwA1EgZ-5I=", ...], 1561623438989]
+// commands.RESET_ALLOWED = function (meta, args) {};
+
 // ["ADD_OWNERS", ["7eEqelGso3EBr5jHlei6av4r9w2B9XZiGGwA1EgZ-5I="], 1561623438989]
 commands.ADD_OWNERS = function (meta, args) {
     // bail out if args isn't an array