patch applied (cabal-branches/cabal-install-0.6): Only report preferred new versions of cabal-install are available

[Duncan Coutts]

Thu Jun  4 10:57:26 PDT 2009  Duncan Coutts <duncan at haskell.org>
  * Only report preferred new versions of cabal-install are available
  That is, use the "preferred-versions" mechanism when deciding
  whether there is a new version available. This would allow us to
  upload a new version without everyone immediately being told to
  get it and try it out.

    M ./Distribution/Client/Update.hs -12 +21

View patch online:
http://darcs.haskell.org/cabal-branches/cabal-install-0.6/_darcs/patches/20090604175726-adfee-4f7fbb24e4654f63ca7d2e8877bd6d09e167059d.gz