clatd: init at 1.6

[clatd](https://github.com/toreanderson/clatd) implements the CLAT
component of the 464XLAT network architecture specified in RFC 6877.

pkgs/by-name/cl/clatd/package.nix

@@ -0,0 +1,63 @@
+{ lib
+, stdenv
+, fetchFromGitHub
+, makeWrapper
+, perl
+, perlPackages
+, tayga
+, iproute2
+, iptables
+}:
+
+stdenv.mkDerivation rec {
+  pname = "clatd";
+  version = "1.6";
+
+  src = fetchFromGitHub {
+    owner = "toreanderson";
+    repo = "clatd";
+    rev = "v${version}";
+    hash = "sha256-ZUGWQTXXgATy539NQxkZSvQA7HIWkIPsw1NJrz0xKEg=";
+  };
+
+  strictDeps = true;
+
+  nativeBuildInputs = [
+    makeWrapper
+    perl # for pod2man
+  ];
+
+  buildInputs = with perlPackages; [
+    perl
+    NetIP
+    NetDNS
+  ];
+
+  makeFlags = [ "PREFIX=$(out)" ];
+
+  preBuild = ''
+    mkdir -p $out/{sbin,share/man/man8}
+  '';
+
+  postFixup = ''
+    patchShebangs $out/bin/clatd
+    wrapProgram $out/bin/clatd \
+      --set PERL5LIB $PERL5LIB \
+      --prefix PATH : ${
+        lib.makeBinPath [
+          tayga
+          iproute2
+          iptables
+        ]
+      }
+  '';
+
+  meta = with lib; {
+    description = "A 464XLAT CLAT implementation for Linux";
+    homepage = "https://github.com/toreanderson/clatd";
+    license = licenses.mit;
+    maintainers = with maintainers; [ jmbaur ];
+    mainProgram = "clatd";
+    platforms = platforms.linux;
+  };
+}