patch applied (ghc): document 'recache' command in the help output (#3684)

[Simon Marlow]

Mon Nov 30 04:20:40 PST 2009  Simon Marlow <marlowsd at gmail.com>
  * document 'recache' command in the help output (#3684)
  Ignore-this: 95a51f76e66055af27cdfc7b5ad7deb3

    M ./utils/ghc-pkg/Main.hs +7

View patch online:
http://darcs.haskell.org/ghc/_darcs/patches/20091130122040-12142-171e47bc48774b96a37583c409502dc18ac0ea4a.gz