Correct attribution and copyright based on https://sourceforge.net/p/bleachbit/code/1165/
Correct attribution and copyright.

https://github.com/az0/cleanerml/commit/6b49417d80de733a4820bae7dce36c839e0b3d79#diff-767d30ba902eb6f5b230178bc0bd0e4d

https://sourceforge.net/p/bleachbit/code/3020/log/?path=/bonus/cleaners/wesnoth.xml
update headers and copyright information
update copyright information based on SVN history at http://sourceforge.net/p/bleachbit/code/HEAD/tree/bonus/cleaners/