core: convert PID 1 to libsystemd-bus

This patch converts PID 1 to libsystemd-bus and thus drops the
dependency on libdbus. The only remaining code using libdbus is a test
case that validates our bus marshalling against libdbus' marshalling,
and this dependency can be turned off.

This patch also adds a couple of things to libsystem-bus, that are
necessary to make the port work:

- Synthesizing of "Disconnected" messages when bus connections are
  severed.

- Support for attaching multiple vtables for the same interface on the
  same path.

This patch also fixes the SetDefaultTarget() and GetDefaultTarget() bus
calls which used an inappropriate signature.

As a side effect we will now generate PropertiesChanged messages which
carry property contents, rather than just invalidation information.

1 files changed, 0 insertions, 2 deletions

diff --git a/src/core/device.h b/src/core/device.h
index 41e8de9703..bb7ae07834 100644
--- a/src/core/device.h
+++ b/src/core/device.h
@@ -50,7 +50,5 @@ struct Device {
 
 extern const UnitVTable device_vtable;
 
-void device_fd_event(Manager *m, int events);
-
 const char* device_state_to_string(DeviceState i) _const_;
 DeviceState device_state_from_string(const char *s) _pure_;