MISSING.md

Things missing out-of-tree

There are a few changes that we had in-tree that we now don't, and will need to add back when this is merged.

• Link local address for the new ether type, IFT_WIREGUARD.
• The PRIV_NET_WG privilege.
• sogetsockaddr helper function, which belongs in uipc_socket.c.

We're emulating these in support.h, but they should go away for the merge.