patch applied (hackage-server): "Introduce TarIndexCache feature"

[devnull at community.haskell.org]

Wed Jan 23 11:40:35 GMT 2013  Edsko de Vries <edsko at well-typed.com>
  * Introduce TarIndexCache feature
  Ignore-this: 9450fc9a76131a0fa21329f67d4a6540
  
  This provides generic support for caching tarball indices. The package contents
  feature now uses this to get access to the tar index. We no longer reconstruct
  the tar index on every request! Whoohoo :)

    M ./Distribution/Server/Features.hs +4
    R ./Distribution/Server/Features/PackageContents/
    M ./Distribution/Server/Features/PackageContents.hs -65 +51
    R ./Distribution/Server/Features/PackageContents/State.hs
    A ./Distribution/Server/Features/TarIndexCache/
    A ./Distribution/Server/Features/TarIndexCache.hs
    A ./Distribution/Server/Features/TarIndexCache/State.hs
    M ./hackage-server.cabal +3