Switch links to be protocol-less links to work better with https

Can we switch the links that are inserted in the page to be protocol-less? This would allow SSL based sites to work better without any warnings that insecure content is loaded.

So for example, instead of:

drupal_add_js('http://search.usa.gov/javascripts/jquery/jquery.autocomplete.min.js', array('type' => 'external', 'defer' => TRUE));

Use this:

drupal_add_js('//search.usa.gov/javascripts/jquery/jquery.autocomplete.min.js', array('type' => 'external', 'defer' => TRUE));

I can submit a patch if the community thinks this is a good idea.