dak currently allows a binary upload to include debug symbol packages
that don't appear in the overrides file or the Binary field of the
changes file, so long as they have the appropriate
'Auto-Built-Package' field and their name matches another binary
package in the upload plus the '-dbgsym' suffix.
For architectures with code signing enabled, our binary uploads never
match this condition as the corresponding binary package has the
'-unsigned' suffix and the debug symbols package does not. Since we
do list the debug symbol packages in the Binary field, they do get
added to the overrides file when accepted through the NEW queue, but
they are automatically pruned from there some time later. Later
uploads then have to go through NEW even though they are not
introducing new binary packages. This would be a big problem for
stable security updates.
For now, move debug symbols back to the main archive with the old
'-dbg' suffix. Keep them enabled for all architectures.
b4b1be4c52