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Jordan Ritter
12fbc78802
The previous wave-4 fix added `host == "::1"` for IPv6 loopback support,
but verification against `mcr.microsoft.com/dotnet/sdk:9.0` showed that
`new Uri("http://[::1]:8000/").Host` returns `"[::1]"` WITH brackets, not
`"::1"`. The string-equality check therefore never matched and IPv6
loopback detection was silently broken.
Switch to `Uri.IsLoopback`, which is the framework-provided helper that
robustly identifies all loopback variations: `localhost`, the entire
`127.0.0.0/8` range, `::1` in any bracketed form, and IPv4-mapped IPv6
loopback (`::ffff:127.0.0.1`). This sidesteps `Uri.Host`'s bracket-
formatting quirks entirely.
The explicit `0.0.0.0` (unspecified address, kept for back-compat) and
`aimock` (Docker-compose service name) checks are retained because they
are not loopback addresses.