Add L2TP-VPN plugin for NetworkManager in default installation

Please add L2TP-VPN plugin for NetworkManager in default installation. L2TP connection used by provider Beeline (Vimpelcom) in Russia. After default install Ubuntu users can not connect with home internet provider over l2tp.

Exist solutions require internet connection (wherefrom on clean new system and l2tp provider?):
1. https://launchpad.net/~seriy-pr/+archive/ubuntu/network-manager-l2tp (no longer supported)
https://github.com/seriyps/NetworkManager-l2tp
http://seriyps.ru/blog/2012/01/31/plagin-l2tp-dlya-networkmanager/

2. https://github.com/nm-l2tp/network-manager-l2tp
Requires adaptation to new Ubuntu releases and online internet again.

3. http://www.cyberforum.ru/ubuntu-linux/thread1774361.html
Requires adaptation to new Ubuntu releases and online internet again.

AskUbuntu: https://askubuntu.com/questions/762355/xerus-missing-l2tp-plugin-for-network-manager

Russian Ubuntu Forum: http://forum.ubuntu.ru/index.php?topic=181916.0

Can you add any plugin for l2tp in default installation?

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