title: NSURL Encoding issue
body: <p>In my project I am communicating with the moudule via usb with ios device, and in my app I am calling the webservice to get the module diagram based on the selected configuration.
   Here is the url.,  <strong><a href="http://mycompurl.php?message=message&amp;color=blue&amp;client=ipad&amp;radio=Pioneer&amp;make=Chevrolet&amp;model=Cobalt&amp;year=2008&amp;option=none" rel="nofollow">http://mycompurl.php?message=message&amp;color=blue&amp;client=ipad&amp;radio=Pioneer&amp;make=Chevrolet&amp;model=Cobalt&amp;year=2008&amp;option=none</a></strong> and when that screen directly with out connecting the module it is working fine showing respected image but when go to that screen after connected with module the url changes like <strong><a href="http://mycompurl.php?message=message&amp;color=blue&amp;client=ipad&amp;radio=Pioneer&amp;make=Chevrolet&amp;model=Cobalt%00%00%00%00%00%00%00%00%00%00%00&amp;year=2008&amp;option=none" rel="nofollow">http://mycompurl.php?message=message&amp;color=blue&amp;client=ipad&amp;radio=Pioneer&amp;make=Chevrolet&amp;model=Cobalt%00%00%00%00%00%00%00%00%00%00%00&amp;year=2008&amp;option=none</a></strong> this. so it not working. I don't know why it is adding %00 to the model.</p>
  
  <p>Thanks in advance</p>
  
  <pre><code>url = [[NSURL alloc] initWithString:urlString stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding]];
  </code></pre>
  
  <p>I am using URL like this</p>