add some explaining words

report.html

@@ -163,6 +163,10 @@
           </td>
         </tr>
       </table>
+      <p>
+        To reduce the amount of spam received, we kindly ask you to type in the following two words:
+      </p>
+
       <script type="text/javascript"
 	      src="http://api.recaptcha.net/challenge?k=6LerjQQAAAAAAKLOqoPSjuKTsXPPuVP4wMENdwjk">
       </script>
@@ -177,7 +181,7 @@
 
       <p>
         <input type="submit" name="clear" value="Clear data" style="float:left; "></input>
-        <input type="submit" name="cancel" value="Clear data" style="float:left; "></input>
+        <input type="submit" name="cancel" value="Cancel" style="float:left; "></input>
         <input type="submit" name="ok" value="Send" style="float:right; "></input><br clear="all">
       </p>
     </form>