optional upload prefix

web/kvm/index.html

@@ -533,6 +533,12 @@
                   <input type="text" id="msd-new-url" style="width: 100%">
                 </td>
               </tr>
+              <tr>
+                <td>Optional upload prefix:</td>
+                <td>
+                  <input type="text" id="msd-new-prefix" style="width: 100%" placeholder="... like /foo/bar">
+                </td>
+              </tr>
             </table>
             <hr>
             <table class="kv">
@@ -544,6 +550,10 @@
                 <td></td>
                 <td>&bull; To speed up the upload, close the stream window.</td>
               </tr>
+              <tr>
+                <td></td>
+                <td>&bull; A non-empty upload prefix will be created when uploading.</td>
+              </tr>
             </table>
           </div>
           <div class="hidden" id="msd-uploading-sub">