title: homebrew - how to install older versions
body: <p>I'm trying to install memcached with older versions (ex: 1.4.5) but I'm not sure how to do it. </p>
  
  <p><code>brew install memcached</code> installs the latest.</p>
  
  <p>I also tried <code>brew install memecached1.4.5</code> but it didn't work.</p>