patch applied (cabal): no longer need to pass --allow-missing-html to haddock

[Ross Paterson]

Fri Oct 26 01:41:24 PDT 2007  Ross Paterson <ross at soi.city.ac.uk>
  * no longer need to pass --allow-missing-html to haddock
  
  This option only affects Haddock if it is invoked with --use-package,
  and Cabal no longer uses that option, as it now gets the arguments for
  --read-interface from ghc-pkg directly (cf patch "rejig location of
  package interfaces for haddock").

    M ./Distribution/Simple/Haddock.hs -6