- subpackage notify_desktop R: dbus(org.freedesktop.Notifications)

- subpackage notify_desktop R: dbus(org.freedesktop.Notifications)
- remove false information from description of notify_desktop: it does not
  require notification-daemon. It requires any implementation of
  org.freedesktop.Notifications dbus service. Anyway dependencies should be
  handled by R/C/S/... tags, not by %description. It does not requires access
  to X server. It only requires access to dbus which can work with no X
  access.

Changed files:
    collectd.spec -> 1.78