title: Trying to install PEAR extension with composer
body: <p>I'm converting an old project (with old dependencies) to manage it's dependencies using composer. The site uses PEAR's Text_Password. I read that it is possible to install dependencies with composer adding (something like) the following to composer.json:</p>
  
  <pre><code>"repositories": [
      {
          "type": "pear",
          "url": "http://pear.php.net"
      }
  ],
  "require": {
      ...
      "pear-pear/Text_Password": "*"
  },
  </code></pre>
  
  <p>..but I get the error:</p>
  
  <pre><code>$ composer update
  Loading composer repositories with package information
  Initializing PEAR repository http://pear.php.net
  Updating dependencies (including require-dev)
  Your requirements could not be resolved to an installable set of packages.
  
    Problem 1
      - The requested package pear-pear/text_password could not be found in any version, there may be a typo in the package name.
  
  Potential causes:
   - A typo in the package name
   - The package is not available in a stable-enough version according to your minimum-stability setting
     see &lt;https://groups.google.com/d/topic/composer-dev/_g3ASeIFlrc/discussion&gt; for more details.
  </code></pre>
  
  <p>Is it possible to install PEAR libraries with Composer? I notice on packagist there is a collection of PEAR libraries but I couldn't see Text_Password - <a href="https://packagist.org/packages/pear/" rel="nofollow">https://packagist.org/packages/pear/</a></p>
  
  <p>There is also a github repo for Text_Password but I thought maybe installing direct from PEAR was better? - <a href="https://github.com/pear/Text_Password" rel="nofollow">https://github.com/pear/Text_Password</a></p>
  
  <p>Anyway how can I install this package with composer?</p>