A bugfix for DragonFly's adjtime() implementation

[Matthew Dillon]

:While testing a clock synchronization software on DragonFly I observed a 
:problem with the adjtime(2) system call. The retrieved olddelta values 
:appeared to be quite incorrect, and the reason for this eventually turned 
:out to be an elementary bug which can be fixed by the patch below. Please 
:have a look at it, I'd think this case is pretty clear and needs no further 
:description.
:
:Frank Josellis

    Nice catch!  Your patch has been committed.

    If you haven't played around with dntpd for client-side
    synchronization yet, I recommend it.  It doesn't implement the
    server side, but for client side synchronization it does a far better
    job than ntpd.

					-Matt
					Matthew Dillon 
					<dillon at xxxxxxxxxxxxx>