title: How to get Highlighting response for all fields with SolR
body: <p>hi all:<br/>
      I have a document with two fields, name and text, the content of them are same.<br/>
      but when I use highlighting query, the response only return one field which is in parameter q.
      <br/>eg:<br/>
  htp://127.0.0.1:8983/solr/select/?q=name:sony&amp;hl=true&amp;hl.fl=name,text<br/>
  this only return name in highlighting response<br/>
  htp://127.0.0.1:8983/solr/select/?q=text:sony&amp;hl=true&amp;hl.fl=name,text<br/>
  this only return text in highlighting response<br/></p>
  
  <p>I want to get all field with highlighting, is the hl.fl useless?<br/>
  thanks in advance for any help.</p>