rc.conf configured jail not getting IP addresses

[Matthew Pounsett]

> On Mar 31, 2015, at 18:44, Ben Woods <woodsb02 at gmail.com> wrote:
> 
> I think this is mentioned in Handbook section 15.3 "Creating and Controlling Jails":
> https://www.freebsd.org/doc/en/books/handbook/jails-build.html

There's nothing in the section you pasted that says IP addresses for jails must be either preconfigured on the host system or alternatively that the interface MUST be included in the jail_${host}_ip variable.  The implication is that
jail_www_ip="xx.xx.xx.xx" 
is sufficient to configure the IP address on the jail, which is not the case.  Either that variable has to reference the interface name, OR the IP address must already be configured on an interface on the enclosing host.