[Bro] Compiling Broccoli on NetBSD 4

[Vern Paxson]

> I ran into a problem while building the Broccoli part of the Bro
> development version (1.3.2) on NetBSD 4.0. On NetBSD, <sys/sem.h> does
> not define the union semun. The attached patch fixes this build problem
> for me.

Thanks, I've integrated this for the forthcoming 1.4 release.

		Vern