A separate task as requested at T423180.

Feature summary:
Extend T423180 so that (spam-protected) external links can be produced in non-superscripted HTML output. Just remove the restriction to superscripts. If it still needs to be wrapped in a special external link class, that would be reasonable.

A partial test is that this result should render on Wikifunctions.

Use case(s):
As mentioned in the previous task, there are plenty of cases where Wikipedia editors use links in non-superscript text. E.g. Authority Control boxes, or External Links sections. We should be able to reproduce this kind of freedom in AW. The limitation to <sup > fields is unwarranted in my view, especially since we don't have true "references" yet.

Benefits:
More freedom for AW editors to make it more excellent.