Fixing provider issue in source

lib/nconf/provider.js

@@ -210,6 +210,12 @@ Provider.prototype.init = function (options) {
 // Retrieves the value for the specified key (if any).
 //
 Provider.prototype.get = function (key, callback) {
+  if (typeof key === 'function') {
+    // Allow a * key call to be made
+    callback = key;
+    key = null;
+  }
+
   //
   // If there is no callback we can short-circuit into the default
   // logic for traversing stores.