Previously today I have sent in a proposal and a patch to make help- and
Info-mode "remotely" operable (from other buffers). Unfortunately, I have
discovered som copy-pasta errors, and as well some unnecessary byte-compiler
errors, due to where I placed certain function; I guess I hade those definitions
already in my sessions while I tested. Here is the same patch, but I have
furnitured around some code, fixed copy-pasta in the docs and as well replaced
acronym names I have used for local variables for more self-documenting names.

Sorry for not seeing it in the original patch.