zeroconf/Avahi: move dbus_shutdown() call to the end of Main()

Calling dbus_shutdown() too early will break the "udisks2" neighbor
plugin.

Makefile.am

@@ -46,6 +46,7 @@ src_mpd_LDADD = \
 	$(STORAGE_LIBS) \
 	$(PLAYLIST_LIBS) \
 	$(AVAHI_LIBS) \
+	$(DBUS_LIBS) \
 	$(LIBWRAP_LDFLAGS) \
 	$(SQLITE_LIBS) \
 	$(DECODER_LIBS) \
@@ -67,6 +68,8 @@ src_mpd_LDADD = \
 	libutil.a \
 	$(SYSTEMD_DAEMON_LIBS)
 
+src_mpd_CPPFLAGS = $(AM_CPPFLAGS) $(DBUS_CFLAGS)
+
 src_mpd_SOURCES = \
 	src/Main.cxx src/Main.hxx
 

src/Main.cxx

@@ -101,6 +101,10 @@
 #include <systemd/sd-daemon.h>
 #endif
 
+#ifdef ENABLE_DBUS
+#include <dbus/dbus.h>
+#endif
+
 #include <stdlib.h>
 
 #ifdef HAVE_LOCALE_H
@@ -713,6 +717,12 @@ try {
 	IcuFinish();
 
 	log_deinit();
+
+#ifdef ENABLE_DBUS
+	/* free libdbus memory to make memory leak checkers happy */
+	dbus_shutdown();
+#endif
+
 	return EXIT_SUCCESS;
 } catch (const std::exception &e) {
 	LogError(e);

src/zeroconf/ZeroconfAvahi.cxx

@@ -34,8 +34,6 @@
 #include <avahi-common/malloc.h>
 #include <avahi-common/error.h>
 
-#include <dbus/dbus.h>
-
 static constexpr Domain avahi_domain("avahi");
 
 static char *avahi_name;
@@ -277,6 +275,4 @@ AvahiDeinit()
 
 	avahi_free(avahi_name);
 	avahi_name = nullptr;
-
-	dbus_shutdown();
 }