rdfind: Add new package

refined is a very fast duplicate file finder/remover/hardlinker.

pkgs/tools/filesystems/rdfind/default.nix

@@ -0,0 +1,21 @@
+{ stdenv, fetchurl, nettle }:
+
+stdenv.mkDerivation rec {
+  name = "rdfind-${version}";
+  version = "1.3.4";
+
+  src = fetchurl {
+    url = "http://rdfind.pauldreik.se/${name}.tar.gz";
+    sha256 = "0zfc5whh6j5xfbxr6wvznk62qs1mkd3r7jcq72wjgnck43vv7w55";
+  };
+
+  buildInputs = [ nettle ];
+
+  meta = {
+    homepage = http://rdfind.pauldreik.se/;
+    description = "Removes or hardlinks duplicate files very swiftly";
+    license = with stdenv.lib.licenses; gpl2;
+    maintainers = with stdenv.lib.maintainers; [ wmertens ];
+    platforms = with stdenv.lib.platforms; all;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -2426,6 +2426,8 @@ let
 
   rdiff-backup = callPackage ../tools/backup/rdiff-backup { };
 
+  rdfind = callPackage ../tools/filesystems/rdfind { };
+
   rdmd = callPackage ../development/compilers/rdmd { };
 
   rhash = callPackage ../tools/security/rhash { };