* dbus/dbus-spawn.c: s/_exit/exit/ because it was keeping gcov
	data from getting written, and there wasn't a good reason to
	use _exit really.

	* test/decode-gcov.c (mark_inside_dbus_build_tests): don't count
	dbus_verbose lines in test coverage
	(main): add list of functions sorted by # of untested blocks
	to the coverage report

	* dbus/dbus-mempool.c: put some test-only code in DBUS_BUILD_TESTS

	* dbus/dbus-marshal.c (_dbus_marshal_test): extend test coverage

	* dbus/dbus-message-handler.c (_dbus_message_handler_test):
	extend test coverage

	* test/data/auth/cancel.auth-script: test canceling an
	authentication

	* dbus/Makefile.am: remove dbus-server-debug.[hc] for now, as they
	aren't used. in CVS history if we end up needing them.