[PATCH V2] Add RFC 8335 Definitions from Linux 5.12

[Florian Weimer]

* Andreas Roeseler:

> As of commit e542d29ca81d005651680a0a697b72ca13ddc4cc, the constants in
> the Linux kernel have been updated to match the definitions in this
> patchset.
>
> The commit can be found in full here
> https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=e542d29ca81d005651680a0a697b72ca13ddc4cc

Thanks for being flexible about this.  Would you please repost a v3 with
updated URLs?

Thanks,
Florian