patch applied (ghc): document -feager-blackholing

[Simon Marlow]

Thu Jan 15 01:39:22 PST 2009  Simon Marlow <marlowsd at gmail.com>
  * document -feager-blackholing
  Ignore-this: 5958a16c7148cb5df0f4b3f1e1dee6d6

    M ./docs/users_guide/flags.xml +7
    M ./docs/users_guide/using.xml -4 +47

View patch online:
http://darcs.haskell.org/ghc/_darcs/patches/20090115093922-12142-2e15b6f623c295a6a2117191ae24a4517836ceaa.gz