bug#19556: eww: make URI rewriting fully customizable

[Lars Magne Ingebrigtsen]

Eli Zaretskii <eliz@gnu.org> writes:

> idna.el comes with libidn.  And one of the references you see is in
> message.el, which is the default MUA in Emacs.  So not just Gnus uses
> it.

I've wondered why the IDNA stuff isn't implemented natively in Elisp.  I
haven't looked at the spec closely, but from a cursory scan of it a few
years back, it seemed like a not-very-complicated transform.

But my impression may be mistaken...

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