>> So, what's going to happen with scope IDs when NI_WITHSCOPEID goes
>> away?
> always attached like fe80::1%fxp0, unless sin6_scope_id is 0.

So if you really want getnameinfo() to not go making gratuitous
syscalls on you - you want it to be _just_ a purely user-level "format
this data" call - you have to check the address family for IPv6, and
then check the scope ID, and if it's nonzero, format it with a zero
scope ID and attach the scope ID - as a number - yourself?

Ugh.  What is one _supposed_ to use for debugging output?  Or is there
an NI_NUMERICSCOPEID bit now?

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