title: Can not access Jenkins by --prefix value even if --prefix is set
body: <p>I have set the JENKINS_ARGS using /etc/default/jenkins and start jenkins as a daemon with the www-data user.</p>
  
  <p>The system info page shows that --prefix=/jenkins is set</p>
  
  <p>HOME    /var/www
  HUDSON_HOME /var/jenkins
  JENKINS_ARGS     --prefix=/jenkins</p>
  
  <p>But still jenkins is only accessible via <a href="http://ip:port/">http://ip:port/</a> and not <a href="http://ip:port/jenkin">http://ip:port/jenkin</a>.</p>
  
  <p>I have also setting the Jenkins URL on the configuration page, but without success.</p>
  
  <p>Do you know more if there is something else I should do?</p>
  
  <p>This is my environment:
  Linux robopar12227 2.6.35-22-server #35-Ubuntu SMP Sat Oct 16 22:02:33 UTC 2010 x86_64 GNU/Linux 
  java version "1.6.0_20" 
  OpenJDK Runtime Environment (IcedTea6 1.9.13) (6b20-1.9.13-0ubuntu1~10.10.1) 
  OpenJDK 64-Bit Server VM (build 19.0-b09, mixed mode) 
  Jenkins ver. 1.447 </p>