patch applied (ghc): document :source command for GHCi, point to Haskell wiki

[Ian Lynagh]

Thu May  1 13:52:52 PDT 2008  claus.reinke at talk21.com
  * document :source command for GHCi, point to Haskell wiki
  
  	as discussed in this thread:
  	http://www.haskell.org/pipermail/glasgow-haskell-users/2008-April/014614.html
  

    M ./docs/users_guide/ghci.xml +16

View patch online:
http://darcs.haskell.org/ghc/_darcs/patches/20080501205252-969c0-f64ecae128d212b04c5abcce4f790f0e12faf728.gz