Because of the timeout, the exec() function will take at 'most' 10 se…

…conds, IMHO.

index.html

@@ -2551,7 +2551,7 @@ <h4>Responding request handlers with non-blocking operations</h4>
 
         <p>
             This will make HTTP requests to <a href="http://localhost:8888/start" rel="nofollow">http://localhost:8888/start</a>
-            take at least 10 seconds, but requests to <a href="http://localhost:8888/upload" rel="nofollow">http://localhost:8888/upload</a>
+            take at most 10 seconds, but requests to <a href="http://localhost:8888/upload" rel="nofollow">http://localhost:8888/upload</a>
             will be answered immediately, even if /start is still
             computing.
         </p>