CLSA-2026-1787932207 Fix CVE(s): CVE-2020-18771, CVE-2026-25884, CVE-2026-27596

SECURITY UPDATE: out-of-bounds read in the Nikon MakerNote printer - debian/patches/CVE-2020-18771.patch: bound the nikonFocusarea index in Nikon1MakerNote::print0x0088 with EXVCOUNTOF, so a crafted MakerNote cannot make the printer read a pointer from past the end of the table upstream 5e6c2855c...