Merge branch 'vrf-next'

David Ahern says:

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net: vrf: Fix ipv6 source address selection

IPv6 address selection is currently messed up for several use cases such
as unnumbered deployments with global addresses on the VRF device and none
on the enslaved devices.

Update the source address selection to consider the real output route as
opposed to the VRF route that sends packets to the VRF device first (ie.,
implement get_saddr6 similar to the IPv4 method) and update the IPv6
address selection to consider L3 domains and preference for addresses on
the VRF device).
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Signed-off-by: David S. Miller <davem@davemloft.net>