* test/data/valid-config-files/system.d/test.conf: change to
root for the user so warnings don't get printed
* dbus/dbus-message.c: add dbus_message_get_path,
dbus_message_set_path
* dbus/dbus-object-tree.c (do_test_dispatch): add test of
dispatching to a path
* dbus/dbus-string.c (_dbus_string_validate_path): add
* dbus/dbus-marshal.c (_dbus_demarshal_object_path): implement
(_dbus_marshal_object_path): implement
* dbus/dbus-protocol.h (DBUS_HEADER_FIELD_PATH): new header field
to contain the path to the target object
(DBUS_HEADER_FIELD_SENDER_SERVICE): rename
DBUS_HEADER_FIELD_SENDER to explicitly say it's the sender service
* dbus/dbus-object-tree.c: modify to allow overlapping paths to be
registered
(struct DBusObjectSubtree): shrink this
a lot, since we may have a lot of them
(_dbus_object_tree_free_all_unlocked): implement
(_dbus_object_tree_dispatch_and_unlock): implement
* dbus/dbus-pending-call.c: start on new object that will replace
DBusMessageHandler and ReplyHandlerData for tracking outstanding
replies
* dbus/dbus-gproxy.c: start on proxy object used to communicate
with remote interfaces
* dbus/dbus-gidl.c: do the boring boilerplate in here
