bug#19556: eww: make URI rewriting fully customizable

[Ivan Shmakov <ivan@siamics.net>]

>>>>> Lars Magne Ingebrigtsen <larsi@gnus.org> writes:

 > Customisations that require users to write code like this is seldom
 > used,

	That’s why I’ve explicitly mentioned out-of-tree packages.
	The user would not be required write code like that, – just to
	run M-x package-install over the relevant *ELPA package.

 > and you could just define your own `eww' function if you want
 > something else to happen.

	Such an approach has drawbacks on its own.

 > And, as always, making users customise stuff to make bugs (and
 > undesirable behaviour) go away is the wrong approach.  The right
 > thing to do is to fix the bug instead of wall-papering over the bug
 > by allowing customisations.

	The desirability is subjective and may easily depend on the
	specific situation.  This applies to EWW no more and no less
	than it does to the more usual Emacs facilities, – such as, say,
	VC, EPA, Font-Lock, etc.

	Personally, I find eww DWIM undesirable, and would appreciate
	for an easy way to get rid of it.  A way which would not
	interfere with $ git merge, that is.

[…]

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