Most of the stuff like xorg, or kwin and k**** you wont need them because thats for X windows and KDE desktop environment. But the issue is that your are using PC-BSD which is more desktop related bsd, its actually the idea of Ubuntu Desktop, but using FreeBSD and KDE desktop. You shouldnt use that as a server, go better with FreeBSD, or try to run the server in run level 3 or 2.
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