CLSA-2026-1778253061 Fix CVE(s): CVE-2026-27447

SECURITY UPDATE: fix authorization bypass in cupsd caused by case-insensitive comparison of local user and group names. - debian/patches/CVE-2026-27447.patch: compare usernames against the canonical pwname from getpwnam with strcmp in cupsdCheckGroup and cupsdIsAuthorized in scheduler/auth.c;...