patch applied (ghc-6.6/ghc): Check that top-level binders are unqualified names

[Ian Lynagh]

Wed Sep  6 15:01:01 PDT 2006  simonpj at microsoft.com
  * Check that top-level binders are unqualified names
  
  Not having this check led to strange error messages.
  See test rnfail046.
  

    M ./compiler/rename/RnEnv.lhs -19 +25
    M ./compiler/rename/RnNames.lhs -5 +4
    M ./compiler/rename/RnTypes.lhs -5 +3