CLSA-2023-1673905718 Fix CVE(s): CVE-2016-5011

SECURITY UPDATE: Extended partition loop in MBR partition table leads to DoS - debian/patches/CVE-2016-5011-1.patch: ignore MBR extended partition at zero offset - debian/patches/CVE-2016-5011-2.patch: avoid non-empty recursion in EBR - CVE-2016-5011...