link to amd64-images broken

["tobias.vogel@bluewin.ch" <tobias.vogel@bluewin.ch>]

hi there,

the links to to the amd64-images
e.g. http://cdimage.debian.org/debian-cd/3.1_r5/amd64/bt-cd
or http://cdimage.debian.org/debian-cd/3.1_r5/amd64/bt-cd/
seem to be broken.

thanks,

toby