util/platform: Cosmetics.

Signed-off-by: Michael Lippautz <michael.lippautz@gmail.com>
LICENSE: Move to FreeBSD. Follow group guidelines.

Signed-off-by: Michael Lippautz <michael.lippautz@gmail.com>
COPYING -> LICENSE

Signed-off-by: Michael Lippautz <michael.lippautz@gmail.com>
Update files headers to conform with group guidelines.

Signed-off-by: Michael Lippautz <michael.lippautz@gmail.com>