Drop support for "Red Hat" init scripts

Drop support for "Red Hat" init scripts

Despite the misleading name, these were supposed to be used
with a System V style init; however, none of the platforms we
target is using that kind of init anymore: almost all Linux
distributions have switched to systemd, those that haven't
(such as Gentoo and Alpine) are mostly using OpenRC with
custom init scripts, and the BSDs have been doing their own
thing all along.

Signed-off-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>