jail configuration

[Slawa Olhovchenkov]

On Sun, Sep 15, 2013 at 06:35:26PM +0200, Dag-Erling Sm??rgrav wrote:

> We've had jail.conf(5) for several years now, but no way to use it
> because the rc script doesn't support it.
> 
> It is not perfect, but it is much cleaner and much more powerful than
> the old way of setting variables in rc.conf.
> 
> I suggest that the attached patch (and the necessary changes to the
> documentation) is long overdue.

This break existing configuration, yes?
Can you adding (not replace) new way?