dbus-proxy: Make wildcard rules match deeply
dbus-proxy: Make wildcard rules match deeply

For instance, org.my.App.* will now match org.my.App.foo.bar, and even
org.my.App, where it would previously only match org.my.App.foo.

This makes a lot of sense, because it allows you to structure the
subset of the dbus namespace you're granted how you please, and
there is no real security problem with this.

It also matches how arg0namespace works in dbus matches and how the
proposed dbus-implemented filterin works in:
https://bugs.freedesktop.org/show_bug.cgi?id=101902

flatpak/flatpak,flatpak/flatpak,matthiasclasen/flatpak,flatpak/flatpak,flatpak/flatpak,handsome-feng/flatpak,matthiasclasen/flatpak,handsome-feng/flatpak,flatpak/flatpak,matthiasclasen/flatpak,handsome-feng/flatpak,handsome-feng/flatpak,matthiasclasen/flatpak,matthiasclasen/flatpak,handsome-feng/flatpak