patch applied (cabal-install): Generalise the way preferences are specified to the resolver

[Duncan Coutts]

Thu Dec 18 12:49:17 PST 2008  Duncan Coutts <duncan at haskell.org>
  * Generalise the way preferences are specified to the resolver
  We still provide a default global policy, but now we give a
  list of per-package preferences which can be on the version
  or installed state. Later preferences override earlier ones.

    M ./Distribution/Client/Dependency.hs -29 +34
    M ./Distribution/Client/Fetch.hs -1 +1
    M ./Distribution/Client/Install.hs -4 +4

View patch online:
http://darcs.haskell.org/cabal-install/_darcs/patches/20081218204917-adfee-d8811ac9584d8f9ce705b946652bbf587bac15a7.gz