More documentation for loginConfirmed (#66)

Author: alexanderkjeldaas

src/http-auth-interceptor.js

@@ -17,6 +17,10 @@
        * retry of all deferred requests.
        * @param data an optional argument to pass on to $broadcast which may be useful for
        * example if you need to pass through details of the user that was logged in
+       * @param configUpdater an optional transformation function that can modify the                                                                                                                                                   
+       * $http configuration object for requests that are retried                                                                                                                                                        
+       * after having logged in.  This can be used for example to add                                                                                                                                                    
+       * an authentication token.  It must return the modified configuration object.
        */
       loginConfirmed: function(data, configUpdater) {
         var updater = configUpdater || function(config) {return config;};