I do believe this work is not elligable for (manditory) copyright
protection, but just in case, so that it does not default to proprietary:


Copyright © 2013  Mattias Andrée (maandree@member.fsf.org)

Copying and distribution of this file, with or without modification,
are permitted in any medium without royalty provided the copyright
notice and this notice are preserved.  This file is offered as-is,
without any warranty.