patch applied (cabal-install): Add the notion of paired packages to the Constraints ADT

Sat Oct 4 18:31:41 PDT 2008 Duncan Coutts * Add the notion of paired packages to the Constraints ADT Packages like base-3 and base-4 are paired. This means they are supposed to be treated equivalently in some contexts. Paired packages are installed packages with the same name where one version depends on the other. M ./Distribution/Client/Dependency/TopDown/Constraints.hs -11 +39 View patch online: http://darcs.haskell.org/cabal-install/_darcs/patches/20081005013141-adfee-f...