patch applied (ghc): FIX #1838, #1987: change where GHCi searches for config files

[Simon Marlow]

Wed Jan 23 06:32:07 PST 2008  Simon Marlow <simonmar at microsoft.com>
  * FIX #1838, #1987: change where GHCi searches for config files
  
  6.6 behaviour:
    - ./.ghci
    - $HOME/.ghci
  
  6.8.[12] behaviour:
    - ./.ghci
    - Windows: c:/Documents and Settings/<user>/.ghci
    - Unix: $HOME/.ghci
  
  6.10 (and 6.8.3 when this is merged):
    - ./.ghci
    - Windows: c:/Documents and Settings/<user>/Application Data/ghc/ghci.conf
    - Unix: $HOME/.ghc/ghci.conf
    - $HOME/.ghci
  
  We will need to document this in the 6.8.3 release notes because it
  may affect Windows users who have adapted their setup to 6.8.[12].

    M ./compiler/ghci/InteractiveUI.hs -26 +33
    M ./docs/users_guide/ghci.xml -16 +32