[m-rev.] for post-commit review: delete an obsolete workaround

[Peter Wang]

On Tue, 27 Jan 2026 15:01:33 +1100 "Zoltan Somogyi" <zoltan.somogyi at runbox.com> wrote:
> For review by anyone.
> 
> Zoltan.

> Delete an obsolete workaround ...
> 
> ... since Solaris died decades ago.
> 
> Add comments explaining some parts of this Mmakefile, and make
> some other comments more readable.

That's fine.

Peter