Fix init script cgroup mounting workarounds to be more similar to cgroupfs-mount...

... and thus work properly

/cc @crosbymichael

For anyone looking to help out by testing this, install the lxc-docker-0.9.0 package from our get.docker.io repo, and then:

Ubuntu:
```bash
sudo wget -O /etc/init/docker.conf https://raw.github.com/tianon/docker/fix-cgroup-hax/contrib/init/upstart/docker.conf
sudo service docker restart
```

Debian:
```bash
sudo wget -O /etc/init.d/docker https://raw.github.com/tianon/docker/fix-cgroup-hax/contrib/init/sysvinit-debian/docker
sudo chmod +x /etc/init.d/docker
sudo service docker restart
```

Don't be shy about commenting if this fixes your issues but even more especially if it doesn't fix them.