The `resolve`/`resolveUri` operation would take the
`.host` of the URI reference and include it verbatim
in the output. Since the `.host` getter returns IPv6
addresses *without* their `[`...`]` braces, that would
become invalid.
Also make sure to normalize the parts of the URI reference
that are used, if it is not a platform URI.
Fixes#55085
BUG= https://dartbug.com/55085
Change-Id: I3dbc8af953af0974346e38ba3203796647069ea8
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/355781
Reviewed-by: Stephen Adams <sra@google.com>
Commit-Queue: Lasse Nielsen <lrn@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Reviewed-by: Nate Bosch <nbosch@google.com>
Commit-Queue: Martin Kustermann <kustermann@google.com>
Auto-Submit: Lasse Nielsen <lrn@google.com>
06d6ef38a9