Relicence to GNU LGPL2+

This file is incorrectly licenced as Artistic, relicence as GNU LGPL 2+

Permitted by e-mail with
Simon Hausmann <Simon.Hausmann@qt.io>
">ksparser.h in kopete is licenced under the ambiguous Artistic licence.
>Can we relicence it as GNU LGPL version 2 or later?
Fine with me :)"

Michel Hermier <michel.hermier@gmail.com>
">ksparser.h in kopete is licenced under the ambiguous Artistic licence.
>Can we relicence it as GNU LGPL version 2 or later?
Also fine with me."

Other edits are only trivial changes.