Added files for freebsd-update

This is an alternate freebsd-update conf file for use with thin jails,
which have different update requirements
Added make

This is a hacked make file that allows thin jails to build software from
ports without running into read-only file system errors.
Periodic file

This file is shamelessly stolen from the ezjail config, and is used to
appropriately limit some of the tasks carried out within thin jails.