title: How can I brew link a specific version?
body: <p>I have a few kegs of the same package in <code>/usr/local/Cellar/libfoo</code> like <code>/usr/local/Cellar/libfoo/1.0.1</code>, <code>/usr/local/Cellar/libfoo/HEAD</code> and <code>/usr/local/Cellar/libfoo/mycopy</code></p>
  
  <p>How can I brew link to a specific version?</p>