stop other people wasting time on updates which should not be done.
ian@ ran into this (while working on devel/hs-aeson and
textproc/hs-attoparsec), and even I didn't notice before trying to
build all Haskell ports (including meta/haskell-platform) with his
diffs.
and the line with the unregister.sh script down to the bottom of
the plist. Silences all the blurb about ".../*.haddock doesn't exist
or isn't a file."
