snabb: Added Snabb Switch (v2015.10) in tools/networking

I have tested this manually with nix-env.

pkgs/tools/networking/snabb/default.nix

@@ -0,0 +1,32 @@
+{stdenv, fetchurl}:
+
+stdenv.mkDerivation rec {
+  name = "snabb-2015.10";
+
+  src = fetchurl {
+    url = "https://github.com/SnabbCo/snabbswitch/archive/v2015.10.tar.gz";
+    sha256 = "15cmw7k2siy9m7s1383l1h8kix8cwb143yvwhxdahbnx4lfnzfz8";
+  };
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp src/snabb $out/bin
+  '';
+
+meta = with stdenv.lib; {
+    homepage = "https://github.com/SnabbCo/snabbswitch";
+    description = "Simple and fast packet networking toolkit";
+    longDescription = ''
+      Snabb Switch is a LuaJIT-based toolkit for writing high-speed
+      packet networking code (such as routing, switching, firewalling,
+      and so on). It includes both a scripting inteface for creating
+      new applications and also some built-in applications that are
+      ready to run.
+      It is especially intended for ISPs and other network operators.
+    '';
+    platforms = [ "x86_64-linux" ];
+    license = licenses.asl20;
+    maintainers = maintainers.lukego;
+  };
+}
+

pkgs/top-level/all-packages.nix

@@ -2989,6 +2989,8 @@ let
 
   smbnetfs = callPackage ../tools/filesystems/smbnetfs {};
 
+  snabb = callPackage ../tools/networking/snabb { } ;
+
   snort = callPackage ../applications/networking/ids/snort { };
 
   solr = callPackage ../servers/search/solr { };