patch applied (cabal): Add the new DoRec extension to Language.Haskell.Extension

Fri Apr 16 13:56:27 PDT 2010 Ian Lynagh * Add the new DoRec extension to Language.Haskell.Extension Part of GHC trac #3968. M ./Language/Haskell/Extension.hs +4 View patch online: http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=cabal;a=darcs_commitdiff;h=2...