add nmap, commandline version only

svn path=/nixpkgs/trunk/; revision=1237

pkgs/tools/security/nmap/builder.sh

@@ -0,0 +1,3 @@
+. $stdenv/setup
+ 
+genericBuild

pkgs/tools/security/nmap/default.nix

@@ -0,0 +1,12 @@
+{stdenv, fetchurl}:
+  
+stdenv.mkDerivation {
+  name = "nmap-3.55";
+  
+  builder = ./builder.sh;
+  src = fetchurl {
+    url = http://download.insecure.org/nmap/dist/nmap-3.55.tar.bz2;
+    md5 = "88b5f010f43b0e2ee0c2cfb468796aa9";
+  };
+  
+}