title: URL: semicolon instead of question mark
body: <p>I'm calling a web service in this format:</p>
  
  <p><a href="http://some.server/rest/resource;a=b" rel="noreferrer">http://some.server/rest/resource;a=b</a></p>
  
  <p>It works but is this valid? I've seen the ; used as a replacement for the &amp; but never seen such an url. I've been looking for an answer but did not find a valid one. If valid what is the meaning of this kind of url?</p>