Improve corosync-notifyd example

Example now contains default option -d, so corosync-notifyd init script
don't fall. Also description is improved a little bit.

Signed-off-by: Jan Friesse <jfriesse@redhat.com>
Reviewed-by: Fabio M. Di Nitto <fdinitto@redhat.com>
Install sysconfig/corosync-notifyd in specfile

Signed-off-by: Jan Friesse <jfriesse@redhat.com>
Reviewed-by: Fabio M. Di Nitto <fdinitto@redhat.com>