Replace the Tango symlinks with copies of the files.

The symlinks were broken under /var...htdocs/images, and Apache
won't follow them without opening a security hole.

This does not introduce a purge failure.

Acked-by: Andreas Beckmann <anbe@debian.org>
Make the Tango weather icons a required package for master.

Missing icons break the web pages.
If the icons are not present, the web page does not adapt - it
shows broken image links.

Acked-by: Andreas Beckmann <anbe@debian.org>
update-piuparts-setup: replace weather icon symlinks with copies

symlinks require FollowSymlinks in the apache config

Signed-off-by: Andreas Beckmann <anbe@debian.org>
p.conf: fix squeeze2bpo2wheezy on piatti

Signed-off-by: Andreas Beckmann <anbe@debian.org>
p.conf: update documentation of the distro setting

Signed-off-by: Andreas Beckmann <anbe@debian.org>