* also recognize "shortcut icon" favicon
Not using querySelector for this because it uses jsdom which might be slower.
Reversing the order because WHATWG says the last appropriate link should be used.
* also fetchIconUrl
* br
* improve readability
* fix
* フォールバックにhrefの評価を含める
* fix val name
* 将来的な拡張を考えたコードにした
Co-authored-by: tamaina <tamaina@hotmail.co.jp>
Co-authored-by: syuilo <Syuilotan@yahoo.co.jp>
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