patch applied (packages/Cabal): Mention self-referential dependency feature in Cabal >= 1.8.0.4.

[Ian Lynagh]

Thu Jun 10 19:27:49 PDT 2010  ezyang at mit.edu
  * Mention self-referential dependency feature in Cabal >= 1.8.0.4.

    M ./doc/Cabal.markdown -1 +4

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=packages/Cabal;a=darcs_commitdiff;h=20100611022749-dfef5-85ca63f088c892f441f8ba135903bb63dbb03d03.gz