Well, while others have educated you that POV indeed uses Y-is-up as a
default, I am coming back to your question how to make POV "behave" like
Quake (now that is a frightening concept!):

Modify you camera statement like this:
(btw: ripped directly from a Moray generated script...)

camera {
  // other stuff here
  sky       <0.0,     0.0,  1.0>  // Use right handed-system!
  up        <0.0,     0.0,  1.0>  // Where Z is up
  right     <1.33333,  0.0,  0.0>
}

And you will have:
X, horizontally, pointing from left to right
Y, horizontally, pointing into the screen
Z, vertically, pointing up

Bye,
Johannes.

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