WITH_/WITHOUT_ variables confusing

[Clint Olsen]

I'm trying to build net/vnc, and I want a server.  The OPTIONS list
shows:

OPTIONS =   server "blah blah" on

So, this tells me that by default it should be on, correct?
Yet the port throughout the makefile references WITHOUT_SERVER.  I've
tried various combinations of WITH_SERVER and WITHOUT_SERVER and I can't
seem to disable WITHOUT_SERVER.

A couple one-line examples in the manpage would clear this up a lot.
I checked the handbook, the ports manpage, and I even looked at the
ports default makefile.

And finally, once I've figured out how to do this, how/where are we
supposed to override this so I never have to deal with it again?  I 
always want a server built.

Thanks,

-Clint