Add Mosquitto MQTT server package

as of now it is just built and copied to the right place so that
the server can be run.  hopefully i will be tweaking with the
configuration files in the future and tweak this a bit more

pkgs/servers/mqtt/mosquitto/default.nix

@@ -0,0 +1,30 @@
+{ stdenv, fetchurl, openssl, libuuid }:
+
+stdenv.mkDerivation rec {
+  pname = "mosquitto";
+  version = "1.4";
+
+  name = "${pname}-${version}";
+
+  src = fetchurl {
+    url = http://mosquitto.org/files/source/mosquitto-1.4.tar.gz;
+    sha256 = "1imw5ps0cqda41b574k8hgz9gdr8yy58f76fg8gw14pdnvf3l7sr";
+  };
+
+  buildInputs = [ openssl libuuid ];
+
+  buildFlags = "mosquitto";
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp src/mosquitto $out/bin/
+  '';
+
+  meta = {
+    homepage = http://mosquitto.org/;
+    description = "An open source MQTT v3.1/3.1.1 broker";
+    platforms = stdenv.lib.platforms.unix;
+    # http://www.eclipse.org/legal/epl-v10.html (free software, copyleft)
+    license = stdenv.lib.licenses.epl10;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -6789,6 +6789,8 @@ let
 
   movit = callPackage ../development/libraries/movit { };
 
+  mosquitto = callPackage ../servers/mqtt/mosquitto { };
+
   mps = callPackage ../development/libraries/mps { };
 
   libmpeg2 = callPackage ../development/libraries/libmpeg2 { };