ospf6d(8) on OpenBSD

The text 25a2e42121c7, as OpenBSD 7.9, OpenBSD 7.8, OpenBSD 7.7, OpenBSD 7.6, OpenBSD 7.5, OpenBSD 7.4, OpenBSD 7.3 shipped it.

Open Shortest Path First (OSPF) for IPv6 routing daemon

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