provide USE_DBUS option to allow to turn on/off dbus parts
per default ON on Linux & BSD systems off for other stuff: win/mac/android/haiku
via USE_DBUS=ON the user of the framework can override that
if ON, DBus is required
per default ON on Linux & BSD systems off for other stuff: win/mac/android/haiku
via USE_DBUS=ON the user of the framework can override that
if ON, DBus is required