title: Vim add '*' character for docs on new line
body: <p>I don't even know how to search for this on google, I tried with the title of this question, but could not find anything useful.</p>
  
  <p>Working with PHP on Vim, if I have something like this:</p>
  
  <pre><code>/**
   * &lt;cursor&gt;
   */
  </code></pre>
  
  <p>If I press enter, I'll get:</p>
  
  <pre><code>/**
   * 
   &lt;cursor&gt;
   */
  </code></pre>
  
  <p>What I want is this:</p>
  
  <pre><code>/**
   * 
   * &lt;cursor&gt;
   */
  </code></pre>
  
  <p>Yes, it is just one character, but it is bugging me a little bit.
  What is the easiest way to achieve this?</p>
  
  <h2>Edit:</h2>
  
  <p>My <code>.vimrc</code> file have these commands (and others):</p>
  
  <pre><code>" Enable syntax highlight
  syntax on
  " Syntax in a plugin-based way
  filetype on
  " Indentation in a plugin-based way
  filetype indent plugin on
  
  set fo+=or
  </code></pre>