Updated to Lua 5.1.3 (Bug fix release)

Updated stdnse to include tobinary, toocal, and tohex functions.
Minor optimizations to listop.lua

nselib/stdnse.lua

@@ -1,5 +1,5 @@
 -- See nmaps COPYING for licence
-module(..., package.seeall)
+module(... or "stdnse", package.seeall)
 
 print_debug = function(...)
 	local verbosity = 1;
@@ -104,3 +104,39 @@ make_buffer = function(sd, sep)
 
   return self
 end
+
+do
+  local t = {
+    ["0"] = "0000",
+    ["1"] = "0001",
+    ["2"] = "0010",
+    ["3"] = "0011",
+    ["4"] = "0100",
+    ["5"] = "0101",
+    ["6"] = "0110",
+    ["7"] = "0111",
+    ["8"] = "1000",
+    ["9"] = "1001",
+    a = "1010",
+    b = "1011",
+    c = "1100",
+    d = "1101",
+    e = "1110",
+    f = "1111"
+  };
+
+  function tobinary(n)
+    assert(tonumber(n), "number expected");
+    return (("%x"):format(n):gsub("%w", t):gsub("^0*", ""));
+  end
+end
+
+function tooctal(n)
+  assert(tonumber(n), "number expected");
+  return ("%o"):format(n)
+end
+
+function tohex(n)
+  assert(tonumber(n), "number expected");
+  return ("%x"):format(n);
+end