This patch is sponsored by Hac 07.
Have you hacked a lambda today?

For some unknown reason, we were passing --use-package=P to haddock,
where P is the name of the current executable package.  This can never
work, since P is not a library and will not be installed.  Fortunately
Haddock ignores the error and continues anyway.

Without this patch, Cabal is effectively "version-less" and all .cabal
files with a version requirement are unusable. Therefore I think that
this patch (or at least something equivalent) should be pushed to the
6.6.1 branch, too.

added --save-configure flag to clean. got some complaints that there was no way to avoid reconfiguring after a clean.  now if you use --save-configure, you should be able to.

As suggested by Claus Reinke in this ticket:
http://hackage.haskell.org/trac/hackage/ticket/105