SECURITY UPDATE: Integer overflow in Lua cmsgpack library
debian/patches/CVE-2022-24834.patch: partial backport hardening
deps/lua/src/luacmsgpack.c against integer overflows in mpbufappend
and the encode/decode helpers (cmsgpack-only; the cjson half of the
upstream fix is dead code under USESYSTEM_LUA=yes and is tracked via
the lua-cjson source package)