Allow internal links with text equal to their anchor

[jyasskin]

I'm converting a Markdown document that uses ... description of all [Components](#components) to make a link whose text is "Components" to a section whose id also happens to be "components". Unfortunately,

kramdown-rfc/lib/kramdown-rfc2629.rb

Lines 1165 to 1167 in 18d5a95

	if target.downcase == res.downcase
	res = '' # get rid of raw anchors leaking through
	end

turns that linking style into <xref target="components"/> with no linking text, which results in output like "description of all Section 3". I could link with {{components}}{:format="title"}, but that produces "Components", which is inconsistent with all the other internal links that show up like "Grammar (Section 4)" (with both parts linked). I may wind up turning all internal links into Components ({{components}}) so they can all be consistent, but it would be nice to be able to link the text in addition to the section number.

It seems like there should be a way to tell kramdown-rfc that this particular document doesn't have accidental anchors in linking text.

[cabo]

Oh yes.
This has hit me already as well.
I need to find out why that workaround was necessary and whether I can defeat it.
Might need a couple of weeks right now...