automatic rpm dependencies for dbus services, part deux

In my last related post on the topic, hughsie rightfully suggested that dbus dependencies be scoped system vs session.  So, here we are with an implentation that does
Provides: dbus-session(...)
and
Provides: dbus-system(...)
for dbus session and system services respectively.

See  http://rdieter.fedorapeople.org/dbus/

Modulo any bugs or bikeshedding over the particular naming (any suggestions?), I'll stew things over another week or so before sending this upstream for consideration.