[wget-notify] [bug #20422] Wget should handle IRIs.

[Micah Cowan]

Follow-up Comment #3, bug #20422 (project wget):

See RFC 3987, and also
http://www.w3.org/TR/REC-html40/appendix/notes.html#non-ascii-chars

Probably, we should carry sufficient information around with the URL that we
can try each of the following in turn, until we find one that works:

0 Transcode from the document's encoding to UTF-8, and percent-encode
0 Directly percent-encode the actual bytes that were used

There might also be cases where we'd want to try transcoding into
ISO-8859-1.

Host-names, of course, should only support punycoding. Perhaps if an
internationalized host name is detected, we should forgo the "actual bytes"
version, as there really can't be any expected meaning for a URI that has
non-ASCII characters in the host name, and non-UTF-8 characters in the
remainder.

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