title: Is % percentage a valid url character
body: <p>I am trying to put a url, something like the following <strong><code>urn:test.project:123</code></strong>, as part of the url. </p>
  
  <p>Does it make sense to encode <strong><code>urn:test.project:123</code></strong> into <strong><code>urn%3atest.project%3a123</code></strong> and decode it back to <strong><code>urn:test.project:123</code></strong> at the receiver end?</p>
  
  <pre><code>http://{domain}/abc/urn%3atest.project%3a123/Manifest
  </code></pre>