title: Two different HTTPService classes in Flex
body: <p>Why are there two different HTTPService classes in Flex?
  <a href="http://livedocs.adobe.com/flex/2/langref/mx/rpc/http/HTTPService.html" rel="noreferrer">this</a>
  and
  <a href="http://livedocs.adobe.com/flex/2/langref/mx/rpc/http/mxml/HTTPService.html" rel="noreferrer">this</a></p>
  
  <p>And the second one inherits the first one.
  Why couldn't there be a single class combining the two?</p>