Merge branch 'ip-addr-proto' into next

Petr Machata  says:

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IPv4 and IPv6 addresses can be assigned a protocol value that indicates the
provenance of the IP address. The attribute is modeled after ip route
protocols, and essentially allows the administrator or userspace stack to
tag addresses in some way that makes sense to the actor in question.
Support for this feature was merged with commit 47f0bd503210 ("net: Add new
protocol attribute to IP addresses"), for kernel 5.18.

In this patchset, add support for setting the protocol attribute at IP
address addition, replacement, and listing requests.

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Signed-off-by: David Ahern <dsahern@kernel.org>