This reworks cgroups support so we have one variable in rc.conf for each
controller instead of each setting.
Also we add support for all of the possible cgroup controllers.
I would like to thank Alexander Vershilov for his help with testing and
reworking this code.
sh/rc-cgroup.sh.in: new script to handle cgroup processing
sh/rc-cgroup.sh.in: do not use grep or cut (modification by William Hubbs)
sh/runscript.sh.in: use the cgroup script
