Lpc2000

Reading through the message archives, I see conflicting information on
the SPI SSEL pin.  Bill Knight says the SPI SSEL pin must be pulled low
for the LPC210X to operate as an SPI master, but Aminder says it needs
to be pulled to 3.3V.  Page 127 of the user manual (that I have) implies
that this pin could be used as a GPIO in SPI master mode, and the manual
gives no mandate on the use of this pin in master mode.

What should I do with this pin?