Based on https://git.netfilter.org/nftables/commit/include/datatype.h?id=cca4c856301caa8959ac98aac5811130bc19512c
It makes more sense to point to datatype.h in the comment since the
actual definitions of these types are scattered throughout src/.
uid_t and gid_t sizes are fixed at 4 bytes currently, but that might
of course change. I couldn't find a good way to make this
dynamic. There are a number of Sizeof* constants in x/sys/unix, so
that's probably the right place to add them.
Tommie Gannert
Leon Vack
Serguei Bezverkhi