CLSA-2021-1639686040 Fix CVE(s): CVE-2021-3984, CVE-2021-3973, CVE-2021-3974, CVE-2021-4019, CVE-2021-4069

SECURITY UPDATE: Using freed memory with regexp using a mark - debian/patches/CVE-2021-3974.patch: Get the line again after getting the mark position - CVE-2021-3974 SECURITY UPDATE: Illegal memory access when C-indenting - debian/patches/CVE-2021-3984.patch: Also set the cursor column -...