title: form:select incorrectly rendering as multiple="multiple"
body: <p>I have a select box that is showing up as a multi-select box when I want it to be a drop down.  I cannot figure out how to change it. </p>
  
  <pre><code>&lt;form:select path="roles" id="role" cssClass="form-control"&gt;
      &lt;form:options items="${roles}" itemLabel="description" itemValue="id"/&gt;&lt;/form:select&gt;
  </code></pre>
  
  <p>The html that is produced as a result of this (see below) has the multiple box attribute added. </p>
  
  <pre><code>&lt;select id="role" name="roles" class="form-control" multiple="multiple"&gt;
       &lt;option value="1"&gt;Administrator&lt;/option&gt;
  &lt;/select&gt;
  &lt;input type="hidden" name="_roles" value="1"/&gt;
  </code></pre>
  
  <p>It also produces that hidden input and I don't understand why. </p>
  
  <p>Any help would be appreciated.</p>