[m-rev.] for post-commit review: carve two new modules out of intermod.m

[Julien Fischer]

On Wed, 1 Dec 2021, Zoltan Somogyi wrote:

> For review by anyone. Since there are no code changes, just movement,
> the only parts worth reviewing are the comments and documentation.

...

> Carve two new modules out of intermod.m.

That's fine.

Julien.