func SetClockSequence(seq int) {
	if seq == -1 {
		var b [2]byte
		randomBits(b[:]) // clock sequence
		seq = int(b[0])<<8 | int(b[1])
	}
	old_seq := clock_seq
	clock_seq = uint16(seq&0x3fff) | 0x8000 // Set our variant
	if old_seq != clock_seq {
		lasttime = 0
	}
}
func SetClockSequence(seq int) {
	if seq == -1 {
		var b [2]byte
		randomBits(b[:]) // clock sequence
		seq = int(b[0])<<8 | int(b[1])
	}
	old_seq := clock_seq
	clock_seq = uint16(seq&0x3fff) | 0x8000 // Set our variant
	if old_seq != clock_seq {
		lasttime = 0
	}
}
// SetClockSeq sets the clock sequence to the lower 14 bits of seq.  Setting to
// -1 causes a new sequence to be generated.