ghostscript: maintenance update
libffi: produce portable library, enable doCheck

Thanks to #907.
expect: "minor" update, no longer depends on X/Tk

ANN: https://groups.google.com/forum/#!topic/comp.lang.tcl/lwZjtKOfaLE
I hope this solves a darwin -lXss linkage problem.
(broke most X stuff through dejagnu -> libffi -> llvm or mesa)
expect: fix postInstall library suffix on darwin
libffi: disable doCheck on darwin until we fix dejagnu build
dbus: minor update, style refactoring, parallel build
Merge branch 'master' into x-updates
dejagnu: minor update
libwnck: update

News claim it's important for Xfce-4.10, which still builds.
Merge branch 'master' into x-updates
Merge branch 'master' into x-updates
Merge branch 'x-updates' into master
Update hash for fail2ban
os-specific/darwin/setfile: drop the "unfree" license

Setfile is included by other derivation, which in turns makes them unfree, too.
This causes plenty of evaluation errors on Hydra, i.e.:

  at `haskellPackages_ghc763_profiling.wx.x86_64-darwin' [nixpkgs = ..., officialRelease = false]:
  user-thrown exception: package ‘setfile’ has an unfree license, refusing to evaluate

Now, it's true that "setfile" is unfree, but this doesn't affect us: our
derivation doesn't include the actual binary -- it just contains a symlink to
"/usr/bin/SetFile". Arguably, our setfile derivation is free and we can
re-distribute it.
tcpcrypt: patch tcpcryptd to run under uid 93 instead of 666
happy: add version 1.18.11
haskell-vault: update to version 0.3.0.2
git-annex: update to version 4.20130909
idris: re-generate with cabal2nix
haskell-acid-state: update to version 0.12.0