[Xymon] Update link to 4.3.5 on xymon.com

Hi Carl,

On Mon, 19 Sep 2011 13:08:58 +0200, Carl Melgaard <Carl.Melgaard at STAB.RM.DK> wrote:

The stable release on xymon.com still points to version 4.3.4 :)

Thanks - I tend to forget about updating that link.

Regards, Henrik