title: Cannot retrieve and install ejabberd contribution modules
body: <p>I have installed ejabberd 16.03 from binary source (ejabberd-16.03-osx-installer.app.zip)</p>
  
  <p>My os is OS X Yosemite</p>
  
  <p>After installation completed I started ejabberd:</p>
  
  <pre><code>cd ejabberd_directory/bin
  
  ./ejabberdctl start
  </code></pre>
  
  <p>I even checked the status to make sure it is started. Then I tried to retrieve the list of available modules:</p>
  
  <pre><code>./ejabberdctl modules_update_specs
  </code></pre>
  
  <p>and it says ok!</p>
  
  <p>But I get nothing by running this:</p>
  
  <pre><code>./ejabberdctl modules_available
  </code></pre>
  
  <p>And I cannot install any module.</p>
  
  <p>I would appreciate any help..</p>