* dbus/dbus-sysdeps.h:

	* dbus/dbus-sysdeps.h:
	* dbus/dbus-sysdeps-unix.c: Add function
	_dbus_make_file_world_readable that chmods a file to 0644.

	* dbus/dbus-sysdeps-unix.c (_dbus_get_autolaunch_address):
        Avoid writing to the static "argv" array, thereby avoiding a
        COW on the child process.

	* dbus/dbus-internals.c (_dbus_create_uuid_file_exclusively):
        call _dbus_make_file_world_readable on the created file.