SPD entries too

Warning: the end-point addresses are not strictly in SPD entries but
they are in a structure bound to SPD entries in implementations I use
and there are somewhere as part of the policies in any implementation.

When a peer address is updated, this should impact not only some SAD
entries (end-point addresses, named "tunnel header IP source and
destination address" in last RFC 2401bis, are SA parameters/data items
in the SAD) but also the corresponding SPD entries (or policies).
The rationale is one'd like to see peer address updates to survive
to any kind of rekey/restart.

Any comment (or a good terminology)?

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