Fix for #993 LIST_BRANCHES without admin

Boris Stumm

2016-01-06 d54bd60b923bbd703bb668601d412d4295d2f503

 src/main/java/com/gitblit/transport/ssh/UsernamePasswordAuthenticator.java

@@ -51,7 +51,7 @@
      }

      username = username.toLowerCase(Locale.US);
      UserModel user = authManager.authenticate(username, password.toCharArray());
      UserModel user = authManager.authenticate(username, password.toCharArray(), null);
      if (user != null) {
         client.setUser(user);
         return true;