Merge 'master' into x-updates
mesa: major update 10.0.4 -> 10.1.1
xorg: minor updates of three packages
xorg-server: major update 1.14.5 -> 1.15.1
xorg: revert fontsproto update, as it breaks libXfont

This partially reverts commit 30ac332563318be4e445dc3335e803326df84d3c.
https://groups.google.com/forum/#!msg/xorg-devel/SvgqiQnSN7c/f0wjRhauqvUJ

It's sad that the currently *released* versions don't even compile together,
and no dev reacts for four days so far...
xorg-server: go back to 1.14.6 due to intel problems

Again, stable releases not compiling together :-/
Add expression for cabal-install 1.20.0.0
Fix icu4c expression for latest gcc (fixes #2341)
Updated OCaml package findlib
Updated OCaml package pcre
nixos: evaluate assertions at toplevel, not at systemPackages

Fixes #2340
gdk-pixbuf: check for writable $out/.., closes #2115
Add expression for sage
wireshark: build with libcap (POSIX capabilities)

This makes running wireshark (or more specifically, dumpcap) as root a
bit more secure. From <wireshark-1.11.2>/doc/README.packaging:

  The "--with-libcap" option is only useful when dumpcap is installed
  setuid. If it is enabled dumpcap will try to drop any setuid privileges
  it may have while retaining the CAP_NET_ADMIN and CAP_NET_RAW
  capabilities. It is enabled by default, if the Linux capabilities
  library (on which it depends) is found.
wireshark: add myself (bjornfor) as maintainer
wireshark: add patch to lookup "dumpcap" in PATH

What this allows us to do is define a "dumpcap" setuid wrapper in NixOS
and have wireshark use that instead of the non-setuid dumpcap binary
that it normally uses.

As far as I can tell, the code that is changed to do lookup in PATH is
only used by wireshark/tshark to find dumpcap. dumpcap, the thing that's
typically setuid, is not affected by this patch. wireshark and tshark
should *not* be installed setuid, so the fact that they now do lookup in
PATH is not a security concern.

With this commit, and the following config, only "root" and users in the
"wireshark" group will have access to capturing network traffic with
wireshark/dumpcap:

  environment.systemPackages = [ pkgs.wireshark ];
  security.setuidOwners = [
    { program = "dumpcap";
      owner = "root";
      group = "wireshark";
      setuid = true;
      setgid = false;
      permissions = "u+rx,g+x";
    }
  ];
  users.extraGroups.wireshark.gid = 500;

(This wouldn't have worked before, because then wireshark would not use
our setuid dumpcap binary.)
haveged: Update from 1.7c to 1.9.1
Merge branch 'gdk-pixbuf' of git://github.com/lethalman/nixpkgs
gedit: new package

Official text editor of the GNOME desktop environment

https://wiki.gnome.org/Apps/Gedit
gnome3: moved file-roller from desktop/ to apps/