HTML pointing to multipage

[marcoscaceres]

At some point, HTML started pointing to "multipage":
https://html.spec.whatwg.org/multipage

This breaks all specs that were using fragment identifiers pointing back to HTML :( It also makes it really annoying, because now one needs to know in which "page" each concept or interface is defined (and makes referencing awkward and unique for this one spec - no other spec relies on multipage!).

Could we have a reference back to, please:
https://html.spec.whatwg.org/

Or, make a reference entry for each page:

[[HTML-Common-infrastructure]]

@annevk

[marcoscaceres]

NM, @domenic just showed me the magic 🎩🐇😲 ...