title: Search and replace in apache htaccess a RewriteRule
body: <p>I'd basically like to get  </p>
  
  <p><code>/path/file+name+with+plusses.mp3</code> </p>
  
  <p>to rewrite to </p>
  
  <p><code>/path/file name with plusses.mp3</code></p>
  
  <p>In my case wordpress is intercepting the request and giving a 404. But the file does indeed exist.</p>
  
  <p>Given the constraints of the regex in mod_rewrite implementation, I haven't yet seen a straightforward way of doing this.</p>