reproducible Debian: Ensure that we can always get back to "home" of this package

I forget what it's called in "Don't Make Me Think" but I keep trying to
click this to get back to the "homepage" for this suite/arch/pkg combo.

Signed-off-by: Chris Lamb <lamby@debian.org>
Signed-off-by: Holger Levsen <holger@layer-acht.org>