title: New session for every domain name
body: <p>I'm running Ubuntu / nginx and php-fpm. When I open my website <a href="http://www.mydomain.com" rel="nofollow">http://www.mydomain.com</a> I have to log in and a session is being created by PHP. When I log on to <a href="http://mydomain.com" rel="nofollow">http://mydomain.com</a> I have to log in again and another session is being created.</p>
  
  <p>How can I prevent PHP from creating new sessions and stick with one? Or is this rather a web server issue?</p>