Added this comment:
```
                /* path-entry can look like this:
                 * <path-entry>
                 *   <prefix>/dojo</prefix>
                 *   <target-path>http://my-cdn.com/dojo/1.9.2</target-path>
                 *   <target-path>http://other-cdn.com/dojo/1.9.2</target-path>
                 *   <target-path>/local/path/dojo/1.9.2</target-path>
                 * </path-entry>
                 *
                 * esp. note that multiple target-paths are possible
                 * the second target-path and all following target-paths are interpreted as fallback
                 * urls by require.js
                 */
```