[whatwg/url] Make hostname setter return failure if a port is given (#604)

Fixes #601.

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<a href="https://whatpr.org/url/604.html" title="Last updated on May 17, 2021, 8:30 PM UTC (081f235)">Preview</a> | <a href="https://whatpr.org/url/604/0915d88...081f235.html" title="Last updated on May 17, 2021, 8:30 PM UTC (081f235)">Diff</a>
You can view, comment on, or merge this pull request online at:

  https://github.com/whatwg/url/pull/604


-- Commit Summary --

  * Make hostname setter return failure if a port is given

-- File Changes --

    M url.bs (2)

-- Patch Links --

https://github.com/whatwg/url/pull/604.patch

https://github.com/whatwg/url/pull/604.diff


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