title: Add suffix to file name AFTER extension (batch mode)
body: <p>Hey I know that this question has been asked in one form or another, but all the ones I could find were for java script, or C, or some other coding language.</p>
  
  <p>I am looking for a command line argument (able to be executed from command prompt) that will let me add (.)__ meta __ to the end of all (multiple) file name extensions in a folder. </p>
  
  <p>Example, I want to rename these files:</p>
  
  <pre><code>database.db
  userkey.mb
  pdox.net
  apphistory.px
  keyfile1.xg0
  keyfile2.xg1
  keyfile3.xg2
  clock.yg0
  timer.yg1
  </code></pre>
  
  <p>to this:</p>
  
  <pre><code>database.db.__meta__
  userkey.mb.__meta__
  pdox.net.__meta__
  apphistory.px.__meta__
  keyfile1.xg0.__meta__
  keyfile2.xg1.__meta__
  keyfile3.xg2.__meta__
  clock.yg0.__meta__
  timer.yg1.__meta__
  </code></pre>
  
  <p>Is it possible to write a code that is capable of this?<br>
  if there is any software to do this let me know. I have looked and so far have been unsuccessful.</p>