title: How can old sessions in /var/lib/php/session/ be flushed?
body: <p>I noticed recently that I have a huge number of sessions in there - 1.3M sessions (as determined from <code>ls -l /var/lib/php/session/ | wc -l</code>). My weekly visits are only in the single-digit thousands, so this seems crazy high - I'm assuming it is somehow saving the sessions and never flushing the old ones for some reason.</p>
  
  <p>Are there relevant settings in the php.ini that control these?</p>