title: nginx : rewrite utf8 : why lower case
body: <p>I have some routes that was previously with uppercase for language and now I want lowrcase.
  here is a route : /Ka/განცხადებები that should simply become /ka/განცხადებები</p>
  
  <p>in my conf
          if ($uri ~ ^/K(.+)){
            set $bb $1;
            rewrite ^(.*)$ $scheme://$host/k$bb permanent;
          }</p>
  
  <p>and I cant understand why but 
  /ka/%E1%83%92%E1%83%90%E1%83%9C%E1%83%AA%E1%83%AE%E1%83%90%E1%83%93%E1%83%94%E1%83%91%E1%83%94%E1%83%91%E1%83%98/</p>
  
  <p>become</p>
  
  <p>/ka/%e1%83%92%e1%83%90%e1%83%9c%e1%83%aa%e1%83%ae%e1%83%90%e1%83%93%e1%83%94%e1%83%91%e1%83%94%e1%83%91%e1%83%98</p>
  
  <p>ie all uppercase letter become lowercase, that cause à pb with my rails app.</p>
  
  <p>does anyone know why nginx do this ? and is it possible to block this ?</p>
  
  <p>I can't just uppercase everything as there is some latin letter and my routes are case sensitive</p>
  
  <p>thanks</p>