dbus and glib2 use different dbus directory

["Jeremy C. Reed" <reed%reedmedia.net@localhost>]

Failed to get bus connection: Cannot spawn a message bus without a 
machine-id: Unable to load /var/lib/dbus/machine-id: Failed to open file 
'/var/lib/dbus/machine-id': No such file or directory

libdbus using /var/db/dbus/ but glib2 using non-existent /var/lib/dbus/

/var/lib/dbus hardcoded in glib2 many places

dbus uses ${VARBASE}/db/dbus