rman: add expression

pkgs/development/tools/misc/rman/default.nix

···
+{stdenv, fetchurl}:
+
+stdenv.mkDerivation {
+  name = "rman-3.2";
+  src = fetchurl {
+    url = mirror://sourceforge/polyglotman/3.2/rman-3.2.tar.gz;
+    sha256 = "0prdld6nbkdlkcgc2r1zp13h2fh8r0mlwxx423dnc695ddlk18b8";
+  };
+  makeFlags = "BINDIR=$(out)/bin MANDIR=$(out)/share/man";
+  preInstall = ''
+    mkdir -p $out/bin
+    mkdir -p $out/share/man
+  '';
+  
+  meta = {
+    description = "Parse formatted man pages and man page source from most flavors of UNIX and converts them to HTML, ASCII, TkMan, DocBook, and other formats";
+    license = "artistic";
+  };
+}