Foreman 1.9 manual

Hello all,

In prep for 1.9, I've copied the 1.8 manual over to 1.9 so we can start
work on it.

The list of tasks is up at
https://github.com/theforeman/theforeman.org/issues/366, split into the
usual stuff (itemised release notes, documenting new config options) and
some specific changes that we should ensure are covered.

If you're able to help, please start working through the list and send
in PRs for the files under _includes/manuals/1.9. The second list and
the updating of Foreman/smart proxy configuration options are the
easiest things to contribute to.

Thanks,

ยทยทยท -- Dominic Cleal Red Hat Engineering