New review comment by sgn on void-packages repository

https://github.com/void-linux/void-packages/pull/31753#discussion_r663289315

Comment:
README and all source files is having `either version 2 of the License, or (at your option) any later version.`
Technically, `GPL-3.0-or-later` is a subset of `GPL-2.0-or-later`.

Also
```
 * @ Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer. 
 *
 * @ Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in
 *   the documentation and/or other materials provided with the
 *   distribution. 
```