rc.conf jails not working in 10.0

[Fbsd8]

My 9.2 rc.conf has a single jail defined.
Copied those jail statements over to 10.0 rc.conf.
The "service jail start jailname" commands issues some warning and the 
usage of the jail command. This used to work in 9.2 but don't work in 
10.0. I thought 10.0 was suppose to work using the rc.conf or jail.conf 
method. Has rc.conf jail support been removed in 10.0?