This depends upon:
--https://reviews.freebsd.org/D40369-- committed
https://reviews.freebsd.org/D40370
It gives more permissions to services (e.g. network access to services which require this) which are started as an automatic service jail (D40370). The sshd patch is important for the sshd-related functionality as described in the man-page of D40370.
The location of the added env vars is supposed to allow overriding them in rc.conf, and to hard-disable the use of svcj for some parts where it doesn't make sense or will not work. Only a small subset of all of the services is tested.