title: Issue with permitted_uri_chars in CodeIgniter
body: <p>I am facing issue with permitted_uri_chars in CodeIgniter. Followig is my config:</p>
  
  <blockquote>
    <p>$config['permitted_uri_chars'] = 'a-z 0-9~%.:_-()@!';</p>
  </blockquote>
  
  <p>As per my config the Special Symbols should be allowed. It work for symbols but when I use the Symbols in combination it don't work.</p>
  
  <p>Scenario:</p>
  
  <blockquote>
    <p><code>http://localhost/ci/test/index/page(new).html</code></p>
  </blockquote>
  
  <p>When my URL as above i am getting the error:</p>
  
  <pre><code>An Error Was Encountered
  
  The URI you submitted has disallowed characters.
  </code></pre>
  
  <p>But following works fine.</p>
  
  <pre><code>http://localhost/ci/test/index/page(new.html
  
  http://localhost/ci/test/index/pagenew).html
  </code></pre>
  
  <p>How can I solve this issue? I don't wish to solve this issue using .htaccess !!</p>