Comment 8 for bug 1446689

Triaged/High; since this affects some users who connect directly through PPPoE. While this may be a relatively low number of people, it's crippling if they cannot retrieve pppoe after the fact due to no network...

This simply needs a cherry-pick of http://cgit.freedesktop.org/NetworkManager/NetworkManager/commit/?id=6fdfb03107138e96e641d12a7c4df5ecfacb5406, which reverts changes that unfortunately landed in vivid too; so should be SRU'd.

As an added benefit, with this patch it is unnecessary to install the pppoe package, everything is handled directly by pppd.