Comment 21 for bug 278153

Actually, this bug has been reported since Hardy or before (I have seen it somewhere, but can't find now where) and obviously the Ubuntu team also forgot about it.
It's specially important to ship VPN plugins not only because of the option that is there in the UI, but also because in many places one won't get internet access without a VPN, including many universities. That would of course prevent the plugin installation in the first place and would force one to seek another computer to download the packages, which is non-trivial for non-power-users.