Fix filename for udev network interface rules

From http://www.freedesktop.org/wiki/Software/systemd/PredictableNetworkInterfaceNames/

You disable the assignment of fixed names, so that the unpredictable
kernel names are used again. For this, simply mask udev's rule file for
the default policy: ln -s /dev/null
/etc/udev/rules.d/80-net-setup-link.rules (since v209: this file was
called 80-net-name-slot.rules in release v197 through v208)
Merge PR #5235, fix predictable network interfaces
grsecurity: Update stable and test patches

stable: 3.0-3.14.25-201411260106 -> 3.0-3.14.25-201412040016
test:   3.0-3.17.4-201411260107  -> 3.0-3.17.4-201412040017
fix installer tests
Merge pull request #5231 from luke-clifton/lc-linear-opengl

Haskell package: linear-opengl
Merge pull request #5232 from joachifm/haskell-mvc

haskell-packages: add mvc and mvc-updates
haskell-cabal2nix: update to version 1.72
firefox-wrapper: use gstreamer hook
nixos/unifi: Ensure stateDir is mounted before proceeding
nixos/synergy: Don't generate units unecessarily
there is no bin/ directory
Add eid-mw: authenticate & sign with Belgian eID identity cards
Add duff: find duplicate files from the command line
nixpkgs: btsync 1.4.93 -> 1.4.103

Signed-off-by: Austin Seipp <aseipp@pobox.com>
mrtg: add 2.17.4

- The Multi Router Traffic Grapher
- You have a router, you want to know what it does all day long?
- Then MRTG is for you. It will monitor SNMP network devices and draw
- pretty pictures showing how much traffic has passed through each interface.
Merge pull request #5239 from robberer/pkgs/mrtg

mrtg: add 2.17.4
nixos: Remove torify module

'torify' now ships with the tor bundle itself; and using torsocks is
recommended over tsocks (torify will use torsocks automatically.)

Signed-off-by: Austin Seipp <aseipp@pobox.com>
nixpkgs: remove tsocks

tsocks is old, and users should be using torsocks these days instead.

Signed-off-by: Austin Seipp <aseipp@pobox.com>
nixpkgs: torsocks 1.3 -> 2.0.0

Additionally, this fixes 'torsocks' using the 'which' executable as a
dependency.

Signed-off-by: Austin Seipp <aseipp@pobox.com>
nixpkgs: tor depends on torsocks

This may seem strange, but tor distributes its 'torify' wrapper which in
turn attempts to use torsocks to bridge a connection, meaning 'tor'
users out the box may want it to work.

Signed-off-by: Austin Seipp <aseipp@pobox.com>