gdbusproxy: Add G_DBUS_DEBUG=proxy support
(Turned into a merge request by Philip Withnall; unmodified from original patch on https://bugzilla.gnome.org/show_bug.cgi?id=654905.)
Closes #424 (closed)
(Turned into a merge request by Philip Withnall; unmodified from original patch on https://bugzilla.gnome.org/show_bug.cgi?id=654905.)
Closes #424 (closed)