CLSA-2025-1762537520 Fix CVE(s): CVE-2023-4408

SECURITY UPDATE: The DNS message parsing code in named includes a section whose computational complexity is overly high - debian/patches/CVE-2023-4408.patch: refactoring parsing code - debian/patches/CVE-2023-4408-1.patch: fix DNSSEC test suite - debian/libdns1100.symbols: some function...