fcntl F_SETLKW64 failing on Solaris

[Tristan Ball]

> Just a warning - using --with-spinlocks can be very dangerous. If a smbd
> process abends holding a spinlock, all the smbd's will have to be
restarted
> and the tdb cleared to remove it.
>
> The same won't happen with fcntl tdb's.
>
> Just a little touch of paranoia.... :-).

Click! Of course. Yes, we've seen this, but it hadn't clicked what the
problem was. Bugger, thats enough of a reason for me to remove spinlocks.
Pitty, because it really does seem to perform better.

Thankyou.

T.