Make glib_networking available for dwbem
flightgear: 2.10.0 -> 2.12.0 (and make it run again)

The current FlightGear expression doesn't work:

  bash$ nix-build -A flightgear
  /nix/store/3c47sibzb9h1vhnn0gnh692hkpjc5p5v-flightgear-2.10.0

  bash$ ./result/bin/fgfs
  ERROR: The path '/nix/store/3c47sibzb9h1vhnn0gnh692hkpjc5p5v-flightgear-2.10.0/lib/FlightGear' does not exist in the file system.

  Base package check failed:
    Version [none] found at: /nix/store/3c47sibzb9h1vhnn0gnh692hkpjc5p5v-flightgear-2.10.0/lib/FlightGear
    Version 2.10.0 is required.
  Please upgrade/downgrade base package and set the path to your fgdata
  with --fg-root=path_to_your_fgdata

We could probably make the 2.10.0 version run, but I had already
upgraded it to 2.12.0 before I made it work. It seems only the data dir
configuration was wrong/missing: FG_DATA_DIR="$out/share/FlightGear/".

Simgear must be in version sync with flightgear, hence the upgrade.

Most of the diff is because I rewrote the flightgear expression to what
I think is the "new style". I wanted to add a preConfigure phase but
didn't understand why this expression had custom phases. So I just
rewrote the whole thing to something I consider more readable.
update dwb to the latest revision
experimental/vsftpd

vsftpd improvements:
- intorduce one declarative list of options
- make docummentation strings more understandable and add missing options
  such as SSL/TLS support
- Use environment.etc."vsftpd".text because I can't think about any
  reason why a shell script should be used.
  That code was written in 2009.
sdlmame: add expression
nixos/graphite: carbon, use syslog for logging

Twisted provides option to log with syslog, this enables nicer logging.
Imagine what happens in a case of exception. If logs are written to stdout,
traceback won't be merged thus giving ugly logs. This commit fixes that.
This is also one of the official ways of starting carbon, so no worries.
Adding FriBID browser plugin

FriBID is an open source software for the Swedish e-id system called
BankID. FriBID also supports processor architectures and Linux/BSD
distributions that the official software doesn't support.

https://fribid.se/index.en.html

FriBID plugin is a firefoxWrapper plugin. Enabled by setting:

  nixpkgs.config.enableFriBIDPlugin = true
skype: add workaround for pulseaudio glitches

See http://arunraghavan.net/2013/08/pulseaudio-4-0-and-skype/

Relevant bug reports:
  https://github.com/NixOS/nixpkgs/issues/788
  https://bugs.archlinux.org/task/35690
  https://bugs.freedesktop.org/show_bug.cgi?id=50510

We don't want to disable pulseaudio timer-based scheduling (tsched=0)
because that affects everyone. It seems this is the proper distro fix
for skype + pulseaudio at the moment.
Merge pull request #1073 from offlinehacker/nixos/graphite/fix_carbon

nixos/graphite: carbon, use syslog for logging
Merge pull request #1070 from lovek323/sdlmame

sdlmame: add expression
fail2ban: Update to 0.8.10

Also fix random start failures due to a race between the fail2ban
server and the postStart script.
Remove nix.manualNixMachines

Suggested by Marc Weber.  Fixes #1059.

Generate /etc/nix.machines only if buildMachines is not empty.  Thus,
if you want to manage /etc/nix.machines in some other way, you can set
nix.distributedBuilds to true but not set nix.buildMachines.
Rename /etc/nix.machines to /etc/nix/machines

Since we have a /etc/nix directory, we should use it and not pollute
/etc.
Fix runInMachine

It requires a writable /nix/store to store the build result.  Also,
wait until we've reached multi-user.target before doing the build, and
do a sync at the end to ensure all data to $out is properly written.

http://hydra.nixos.org/build/6496716
Disable the trac test

It's been failing since forever.
xorg-server: Fix a 20 year old security bug

CVE-2013-4396
Really fix the EFI installer test

http://hydra.nixos.org/build/6497361
Fix test evaluation
Add gurobi package

Signed-off-by: Shea Levy <shea@shealevy.com>
Add gurobi token server service

Not yet tested, I don't have a license yet

Signed-off-by: Shea Levy <shea@shealevy.com>