Improve handling of "extlinks"

[YoshiRulz]

No description provided.

[YoshiRulz]

@nattthebear Is this the right approach? It's working well now, but I foresee problems with trying to combine rel values—specifically, I'm thinking of adding rel="ugc" to only some wiki-format excerpts, but as I've written it that would override the other values. So I would need to pass "noopener external nofollow ugc" and then that has to be kept in sync. Is there an existing mechanism for combining class that I've overlooked?

[nattthebear]

@YoshiRulz I don't think you're missing any capabilities. The system has about enough abstraction layers to handle what it does, but no more.

[YoshiRulz]

Then should I contribute first-class support for those attributes before finalising this?

[nattthebear]

If you think it's useful, I could see some sort of rel and class handling as a useful part of the Node capabilities.

[adelikat]

@YoshiRulz : can you fix the merge conflicts in this PR? and then I'll merge