All branches FTBFS since CUPS DSA-4243-1
AppArmor CUPS profile: drop duplicate rule for /usr/lib/cups/backend/mdns (refs: #15744)
Since the cups 2.2.1-8+deb9u2 upload, the default profile confines
the mdns backend with the same rules (ix) as the cupsd binary,
so the rule for it we added manually will conflict. Let's drop it
and follow upstream's lead.