o Fix a bug in the NSE http library which would cause some scripts to

give the error: SCRIPT ENGINE: C:\Program
  Files\Nmap\nselib/http.lua:77: attempt to call field 'parse' (a nil
  value) [Jah]

Also added Win2K dependencies section to nmap-install (I should have
done a separate checkin for that)

nselib/http.lua

@@ -73,8 +73,8 @@ end
 -- @param url The url of the host.
 -- @param options Options passed to http.get.
 -- @see http.get
-get_url = function(url, options )
-  local parsed = url.parse( url )
+get_url = function( u, options )
+  local parsed = url.parse( u )
   local port = {}
 
   port.service = parsed.scheme