patch applied (cabal-branches/cabal-1.2): Use os(windows) not os(win32) in user guide configurations example

[Ian Lynagh]

Fri Dec 28 04:57:35 PST 2007  Duncan Coutts <duncan at haskell.org>
  * Use os(windows) not os(win32) in user guide configurations example
  Spotted by Spencer Janssen

    M ./doc/Cabal.xml -2 +2

View patch online:
http://darcs.haskell.org/cabal-branches/cabal-1.2/_darcs/patches/20071228125735-adfee-1647e156ecd64951316d69ae0d49646edb6b25f4.gz