Change from audio group to something else

[Kaj Ailomaa]

I think I was able to figure out pretty much all about how the cgroups
tools and configs work (and what is possible), however, I never got
realtime scheduling to work Not sure why. Compiled a kernel with
CONFIG_RT_GROUP_SCHED on (which apparently is turned off nowadays),
which I believe is necessary.

My goal was to first grant realtime privilege to any user, but only to
selected processes (like jackd). All seemed to be set up right, but no.
Wonder if anyone would consider this a security issue.

Heard that systemd might get in the way somehow, and I do have systemd
on this machine. 

I might try realtime through cgroups on a distro where it is known to
work, just to be able to skip some (for me) unknown variables for now.
Perhaps gentoo. Or, Fedora (if it is actually known to work there).

No time for a while, so I'll return to the issue in one or two weeks,
probably.