[Shadowlamb] incorrect motd path and unnecessary path disclosure (thx AlbertHofmann)

[dloser]

The #motd command fails as follows:

<AlbertHofmannShadow> #motd
<Lamb3> Can not read /home/lamb/www/GWF3/core/module/Dog/dog_modules/dog_module/Shadowlamb/dog_module/Shadowlamb/shadowlamb_motd.txt

Path is obviously wrong, but should also not be presented to a user.