Merge pull request #668 from xuxiaodong/master

Fix config.json.example format error

config.json.example

@@ -71,7 +71,7 @@
             "searchBase": "change this",
             "searchFilter": "change this",
             "searchAttributes": ["change this"],
-            "usernameField": "change this e.g. uid"
+            "usernameField": "change this e.g. uid",
             "tlsOptions": {
                 "changeme": "See https://nodejs.org/api/tls.html#tls_tls_connect_options_callback"
             }